🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 123 (from laksa115)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa123.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.hancockhealth.org/ja/mayo-health-library/shellfish-allergy/\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.hancockhealth.org/ja/mayo-health-library/shellfish-allergy/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.hancockhealth.org\/ja\/mayo-health-library\/shellfish-allergy\/","crawl_time":1773953206,"first_indexed_time":1740661762,"http_code":200,"src_unparsed":"org,hancockhealth!www,\/ja\/mayo-health-library\/shellfish-allergy\/ s443","src_root_hash":"793357625386019723","history_drop_reason":null,"meta_title":"Shellfish allergy - Hancock Health","meta_descriptions":[],"attrs_boilerpipe_text":"Shellfish allergy is an atypical response by the body’s immune system to proteins in certain marine animals. Marine animals in the shellfish category include crustaceans and mollusks. Examples are shrimp, crabs, lobster, squid, oysters, scallops and snails.\nShellfish is a common food allergy. Some people with shellfish allergy react to all shellfish, while others react to only certain kinds. Reactions range from mild symptoms — such as hives or a stuffy nose — to severe and even life-threatening.\nIf you think you have shellfish allergy, talk to your health care provider. Tests can help confirm the allergy so you can take steps to avoid future reactions.\nShellfish allergy symptoms generally start within minutes to an hour after eating or having contact with shellfish. They may include:\nHives\nItchy, irritated skin\nNasal stuffiness (congestion)\nSwelling of the lips, face, tongue and throat, or other parts of the body\nWheezing or trouble breathing\nCoughing and choking or a tight feeling in the throat\nBelly (abdominal) pain, diarrhea, nausea or vomiting\nDizziness, lightheadedness or fainting\nAnaphylaxis\nAllergies can cause a severe, potentially life-threatening allergic reaction known as anaphylaxis. It can occur within seconds to minutes after exposure to something you’re allergic to — and worsens quickly.\nAn anaphylactic reaction to shellfish is a medical emergency. Anaphylaxis requires immediate treatment with an epinephrine (adrenaline) injection and a follow-up trip to the emergency room. If anaphylaxis isn’t treated right away, it can be fatal.\nAnaphylaxis causes the immune system to release a flood of chemicals that can cause you to go into shock. Signs and symptoms of anaphylaxis include:\nA swollen throat or tongue or a tightness in the throat (airway constriction) that makes it difficult for you to breathe\nCoughing, choking or wheezing with trouble breathing\nShock, with a severe drop in your blood pressure and a rapid or weak pulse\nSevere skin rash, hives, itching or swelling\nNausea, vomiting or diarrhea\nDizziness, lightheadedness or fainting\nWhen to see a doctor\nSeek emergency treatment if you develop signs or symptoms of anaphylaxis.\nSee a health care provider or allergy specialist if you have food allergy symptoms shortly after eating.\nAll food allergies are caused by an immune system overreaction. Your immune system identifies a harmless substance as being harmful. This substance is called an allergen. In shellfish allergy, your immune system mistakenly identifies a certain protein in shellfish as harmful. Your immune system is how your body protects itself, so it produces immunoglobulin E (IgE) antibodies to protect against this allergen. The next time you come in contact with the shellfish protein, these antibodies signal your immune system to release chemicals such as histamine into your bloodstream. This causes a reaction that leads to the symptoms of an allergic reaction.\nTypes of shellfish\nThere are several types of shellfish, each containing different proteins:\nCrustaceans\ninclude crabs, lobster, crayfish, shrimp and prawn\nMollusks\ninclude squid, octopus, mussels, snails, clams, oysters, abalone and scallops\nAn allergy to crustaceans is the most common type. Some people are allergic to only one type of shellfish but can eat others. Other people with shellfish allergy must avoid all shellfish.\nAn allergy to fish — such as salmon, tuna or catfish — is a different seafood allergy from an allergy to shellfish. Some people who are allergic to shellfish may still be able to eat fish, or they could be allergic to both. Your health care provider can help you determine what is safe to eat.\nYou’re at increased risk of developing shellfish allergy if allergies of any type are common in your family.\nThough people of any age can develop shellfish allergy, it’s more common in adults. In fact, shellfish allergy is the most common food allergy in adults. Among adults, shellfish allergy is more common in women. Among children, shellfish allergy is more common in boys.\nIn severe cases, shellfish allergy can lead to anaphylaxis, a dangerous allergic reaction that can be life-threatening.\nWhen you have shellfish allergy, you may be at increased risk of anaphylaxis if you have:\n喘息\nAllergic reactions to very small amounts of shellfish (extreme sensitivity)\nHistory of food-induced anaphylaxis\nStrong family history of allergy\nAnaphylaxis is treated with an emergency injection of epinephrine (adrenaline). If you are at risk of having a severe allergic reaction to shellfish, you always should carry injectable epinephrine (Auvi-Q, EpiPen, others).\nIf you have shellfish allergy, the only way to avoid an allergic reaction is to avoid all shellfish and products that contain shellfish. Even trace amounts of shellfish can cause a severe reaction in some people.\nAvoiding shellfish\nBe cautious when dining out.\nWhen dining at restaurants, always check to make sure that the pan, oil or utensils used for shellfish aren’t also used to prepare other foods, creating cross-contamination. It might be necessary to avoid eating at seafood restaurants, where there’s a high risk of cross-contamination.\nRead labels.\nCross-contamination can occur in stores where other food is processed or displayed near shellfish and during manufacturing. Shellfish may be in fish stock or seafood flavoring. Read food labels carefully.\nShellfish is not usually a hidden ingredient. Companies are required to label any product that contains crustacean shellfish or certain other foods that often cause allergic reactions. However, these regulations don’t apply to mollusks.\nKeep your distance.\nYou may need to completely avoid places where shellfish are prepared or processed. Some people react after touching shellfish or inhaling steam from cooking shellfish.\nBe prepared\nIf you have shellfish allergy, talk with your health care provider about carrying emergency epinephrine and how to use it.\nConsider wearing a medical alert bracelet or necklace that lets others know you have a food allergy.\nIodine or radiocontrast dye\nOne thing you don’t need to worry about is if you’ll also be allergic to iodine or radiocontrast material that’s used in some imaging tests. Even though shellfish contain small amounts of iodine, shellfish allergy is unrelated to the reactions some people have to radiocontrast material or iodine.\nTo find out if you have shellfish allergy, your health care provider will ask about your symptoms and do a physical exam to find or rule out other medical problems.\nA history of allergic reactions shortly after exposure to shellfish can be a sign of shellfish allergy. But the symptoms could also be caused by something else, such as food poisoning.\nAllergy testing is the only sure way to tell what’s causing your symptoms, so your provider may recommend one or both of these tests:\nSkin prick test.\nSmall amounts of the proteins found in shellfish are pricked into skin on your arm or upper back. You’re then watched for an allergic reaction. If you’re allergic, you’ll develop a raised bump (hive) at the test site on your skin. This typically takes about 15 to 20 minutes. Allergy specialists usually are best equipped to perform allergy skin tests.\nBlood test.\nA blood sample is sent to a lab to measure your immune system’s response to a specific allergen. This test measures your immune system’s response to shellfish proteins by measuring the amount of allergy-causing antibodies in your bloodstream, known as immunoglobulin E (IgE) antibodies.\nMedically supervised food challenges can be performed if the diagnosis still isn’t clear after allergy testing.\nThe only sure way to prevent an allergic reaction to shellfish is to avoid shellfish. But despite your best efforts, you may come into contact with shellfish.\nIf you have a severe allergic reaction to shellfish (anaphylaxis), you’ll likely need an emergency injection of epinephrine (adrenaline). If you’re at risk of anaphylaxis to shellfish, your health care provider can give you a prescription in advance and explain how and when to give the injection. Regularly check the expiration date on the packaging to make sure it’s current.\nCarry injectable epinephrine (Auvi-Q, EpiPen, others) with you at all times. Epinephrine is typically given at the first sign of an allergic reaction. A second dose may be needed if symptoms recur. After you use epinephrine, seek emergency medical care, even if you start to feel better.\nYou’re likely to start by seeing your family health care provider. Or you may be referred directly to an allergy specialist.\nWhat you can do\nPrepare for your appointment by making a list of:\nSymptoms,\nincluding any that may seem unrelated to an allergy\n家族の歴史\nof allergies and asthma, including specific types of allergies if you know them\nMedications,\nvitamins, herbs or other supplements you’re taking, and the dosages\nQuestions\nto ask your health care provider\nQuestions related to shellfish allergy include:\nAre my symptoms most likely due to an allergy?\nWill I need any allergy tests?\nShould I see an allergist?\nDo I need to carry epinephrine?\nAre there brochures or other educational materials I can have? What websites do you recommend?\nDon’t hesitate to ask other questions, as well.\nWhat to expect from your doctor\nYour health care provider may ask you questions, such as:\nWhat symptoms are you having? How severe are they?\nWhen did you notice your symptoms?\nHave you reacted to shellfish in the past?\nWhat kind of shellfish did you eat?\nHow soon after eating shellfish did your symptoms occur?\nWhat other foods did you eat during your meal? Don’t forget sauces, beverages and side dishes.\nDid others who dined with you have similar symptoms?\nIs there a history of allergy in your family?\nDo you have other allergies, such as hay fever?\nDo you have asthma or eczema (atopic dermatitis)?\nWhat you can do in the meantime\nAvoid eating or touching any type of shellfish while waiting for your appointment.\n© 1998-2024 Mayo Foundation for Medical Education and Research (MFMER). All rights reserved.","attrs_markdown":"**VISITOR RESTRICTIONS** Click Here\\!\n\n### VISITOR RESTRICTIONS\n**To protect everyone, it has become necessary to limit visitations:**\n\n- **No one with flu-like symptoms may visit (fever, cough, runny nose, chills, and\/or sore throat)**\n- **Visitation is restricted to immediate family as identified by the patient.**\n- **Visitors under the age of 18 are not recommended.**\n- **All guests, vendors, volunteers, and associates must be vigilant about proper handwashing and cover your cough\/sneeze.**\n\n**Thank you for your understanding and cooperation**\n\n何を探していますか？\n\n- [医師を探す](https:\/\/www.hancockhealth.org\/ja\/find-a-doctor\/)\n- [私の請求書を支払う](https:\/\/www.hancockhealth.org\/ja\/patient-hub\/bill-pay\/)\n- [Schedule An Appointment](https:\/\/www.hancockhealth.org\/ja\/patient-hub\/login\/)\n\n近い\n\nメニュー\n\n[(317) 462-5544 今すぐお電話ください。](tel:+13174625544 \"今すぐお電話ください。\")\n\n何を探していますか？\n\n- [患者ハブ](https:\/\/www.hancockhealth.org\/ja\/patient-hub\/)\n  - [アカウントログイン](https:\/\/www.hancockhealth.org\/ja\/patient-hub\/login\/)\n  - [私の請求書を支払う](https:\/\/www.hancockhealth.org\/ja\/patient-hub\/bill-pay\/)\n  - [請求と保険](https:\/\/www.hancockhealth.org\/ja\/patient-hub\/billing-and-insurance\/)\n- [サービスを調べる](https:\/\/www.hancockhealth.org\/ja\/healthcare-services\/)\n- [医師を探す](https:\/\/www.hancockhealth.org\/ja\/find-a-doctor\/)\n- [場所を探す](https:\/\/www.hancockhealth.org\/ja\/find-a-location\/)\n- [救急医療](https:\/\/www.hancockhealth.org\/ja\/healthcare-service\/emergency-immediate-care\/)\n- [ウェルネス](https:\/\/www.hancockhealth.org\/ja\/wellness-education\/)\n  - [ウェルネスセンター](https:\/\/www.hancockhealth.org\/ja\/find-a-location\/?Service=wellness-centers)\n  - [コミュニティリソース](https:\/\/www.hancockhealth.org\/ja\/wellness-education\/health-possible\/community-resources\/)\n  - [クラスとサポートグループ](https:\/\/www.hancockhealth.org\/ja\/wellness-education\/classes\/)\n  - [ブログ](https:\/\/www.hancockhealth.org\/ja\/wellness-education\/health-possible\/)\n- [キャリア](https:\/\/www.hancockhealth.org\/ja\/about\/careers\/)\n- [私たちについて](https:\/\/www.hancockhealth.org\/ja\/about\/)\n  - [財団](https:\/\/www.hancockhealth.org\/ja\/about\/foundation\/)\n  - [メイヨークリニックケアネットワーク](https:\/\/www.hancockhealth.org\/ja\/about\/mayoclinic\/)\n  - [品質と安全性](https:\/\/www.hancockhealth.org\/ja\/about\/quality-and-safety\/)\n- [お問い合わせ](https:\/\/www.hancockhealth.org\/ja\/contact-us\/)\n\n- [家](https:\/\/www.hancockhealth.org\/ja\/)\n- \/\n- [Health Library](https:\/\/www.hancockhealth.org\/ja\/health-library\/)\n- \/\n- Shellfish allergy\n\n[Back to Diseases & Conditions](https:\/\/www.hancockhealth.org\/ja\/health-library\/diseases-conditions\/)\n\n# Shellfish allergy\n\nShellfish allergy is an atypical response by the body’s immune system to proteins in certain marine animals. Marine animals in the shellfish category include crustaceans and mollusks. Examples are shrimp, crabs, lobster, squid, oysters, scallops and snails.\n\nShellfish is a common food allergy. Some people with shellfish allergy react to all shellfish, while others react to only certain kinds. Reactions range from mild symptoms — such as hives or a stuffy nose — to severe and even life-threatening.\n\nIf you think you have shellfish allergy, talk to your health care provider. Tests can help confirm the allergy so you can take steps to avoid future reactions.\n\nShellfish allergy symptoms generally start within minutes to an hour after eating or having contact with shellfish. They may include:\n\n- Hives\n- Itchy, irritated skin\n- Nasal stuffiness (congestion)\n- Swelling of the lips, face, tongue and throat, or other parts of the body\n- Wheezing or trouble breathing\n- Coughing and choking or a tight feeling in the throat\n- Belly (abdominal) pain, diarrhea, nausea or vomiting\n- Dizziness, lightheadedness or fainting\n### Anaphylaxis\nAllergies can cause a severe, potentially life-threatening allergic reaction known as anaphylaxis. It can occur within seconds to minutes after exposure to something you’re allergic to — and worsens quickly.\n\nAn anaphylactic reaction to shellfish is a medical emergency. Anaphylaxis requires immediate treatment with an epinephrine (adrenaline) injection and a follow-up trip to the emergency room. If anaphylaxis isn’t treated right away, it can be fatal.\n\nAnaphylaxis causes the immune system to release a flood of chemicals that can cause you to go into shock. Signs and symptoms of anaphylaxis include:\n\n- A swollen throat or tongue or a tightness in the throat (airway constriction) that makes it difficult for you to breathe\n- Coughing, choking or wheezing with trouble breathing\n- Shock, with a severe drop in your blood pressure and a rapid or weak pulse\n- Severe skin rash, hives, itching or swelling\n- Nausea, vomiting or diarrhea\n- Dizziness, lightheadedness or fainting\n### When to see a doctor\nSeek emergency treatment if you develop signs or symptoms of anaphylaxis.\n\nSee a health care provider or allergy specialist if you have food allergy symptoms shortly after eating.\n\nAll food allergies are caused by an immune system overreaction. Your immune system identifies a harmless substance as being harmful. This substance is called an allergen. In shellfish allergy, your immune system mistakenly identifies a certain protein in shellfish as harmful. Your immune system is how your body protects itself, so it produces immunoglobulin E (IgE) antibodies to protect against this allergen. The next time you come in contact with the shellfish protein, these antibodies signal your immune system to release chemicals such as histamine into your bloodstream. This causes a reaction that leads to the symptoms of an allergic reaction.\n\n### Types of shellfish\nThere are several types of shellfish, each containing different proteins:\n\n- **Crustaceans** include crabs, lobster, crayfish, shrimp and prawn\n- **Mollusks** include squid, octopus, mussels, snails, clams, oysters, abalone and scallops\n\nAn allergy to crustaceans is the most common type. Some people are allergic to only one type of shellfish but can eat others. Other people with shellfish allergy must avoid all shellfish.\n\nAn allergy to fish — such as salmon, tuna or catfish — is a different seafood allergy from an allergy to shellfish. Some people who are allergic to shellfish may still be able to eat fish, or they could be allergic to both. Your health care provider can help you determine what is safe to eat.\n\nYou’re at increased risk of developing shellfish allergy if allergies of any type are common in your family.\n\nThough people of any age can develop shellfish allergy, it’s more common in adults. In fact, shellfish allergy is the most common food allergy in adults. Among adults, shellfish allergy is more common in women. Among children, shellfish allergy is more common in boys.\n\nIn severe cases, shellfish allergy can lead to anaphylaxis, a dangerous allergic reaction that can be life-threatening.\n\nWhen you have shellfish allergy, you may be at increased risk of anaphylaxis if you have:\n\n- 喘息\n- Allergic reactions to very small amounts of shellfish (extreme sensitivity)\n- History of food-induced anaphylaxis\n- Strong family history of allergy\n\nAnaphylaxis is treated with an emergency injection of epinephrine (adrenaline). If you are at risk of having a severe allergic reaction to shellfish, you always should carry injectable epinephrine (Auvi-Q, EpiPen, others).\n\nIf you have shellfish allergy, the only way to avoid an allergic reaction is to avoid all shellfish and products that contain shellfish. Even trace amounts of shellfish can cause a severe reaction in some people.\n\n### Avoiding shellfish\n- **Be cautious when dining out.** When dining at restaurants, always check to make sure that the pan, oil or utensils used for shellfish aren’t also used to prepare other foods, creating cross-contamination. It might be necessary to avoid eating at seafood restaurants, where there’s a high risk of cross-contamination.\n- **Read labels.** Cross-contamination can occur in stores where other food is processed or displayed near shellfish and during manufacturing. Shellfish may be in fish stock or seafood flavoring. Read food labels carefully.\n  Shellfish is not usually a hidden ingredient. Companies are required to label any product that contains crustacean shellfish or certain other foods that often cause allergic reactions. However, these regulations don’t apply to mollusks.\n- **Keep your distance.** You may need to completely avoid places where shellfish are prepared or processed. Some people react after touching shellfish or inhaling steam from cooking shellfish.\n### Be prepared\nIf you have shellfish allergy, talk with your health care provider about carrying emergency epinephrine and how to use it.\n\nConsider wearing a medical alert bracelet or necklace that lets others know you have a food allergy.\n\n### Iodine or radiocontrast dye\nOne thing you don’t need to worry about is if you’ll also be allergic to iodine or radiocontrast material that’s used in some imaging tests. Even though shellfish contain small amounts of iodine, shellfish allergy is unrelated to the reactions some people have to radiocontrast material or iodine.\n\nTo find out if you have shellfish allergy, your health care provider will ask about your symptoms and do a physical exam to find or rule out other medical problems.\n\nA history of allergic reactions shortly after exposure to shellfish can be a sign of shellfish allergy. But the symptoms could also be caused by something else, such as food poisoning.\n\nAllergy testing is the only sure way to tell what’s causing your symptoms, so your provider may recommend one or both of these tests:\n\n- **Skin prick test.** Small amounts of the proteins found in shellfish are pricked into skin on your arm or upper back. You’re then watched for an allergic reaction. If you’re allergic, you’ll develop a raised bump (hive) at the test site on your skin. This typically takes about 15 to 20 minutes. Allergy specialists usually are best equipped to perform allergy skin tests.\n- **Blood test.** A blood sample is sent to a lab to measure your immune system’s response to a specific allergen. This test measures your immune system’s response to shellfish proteins by measuring the amount of allergy-causing antibodies in your bloodstream, known as immunoglobulin E (IgE) antibodies.\n\nMedically supervised food challenges can be performed if the diagnosis still isn’t clear after allergy testing.\n\nThe only sure way to prevent an allergic reaction to shellfish is to avoid shellfish. But despite your best efforts, you may come into contact with shellfish.\n\nIf you have a severe allergic reaction to shellfish (anaphylaxis), you’ll likely need an emergency injection of epinephrine (adrenaline). If you’re at risk of anaphylaxis to shellfish, your health care provider can give you a prescription in advance and explain how and when to give the injection. Regularly check the expiration date on the packaging to make sure it’s current.\n\nCarry injectable epinephrine (Auvi-Q, EpiPen, others) with you at all times. Epinephrine is typically given at the first sign of an allergic reaction. A second dose may be needed if symptoms recur. After you use epinephrine, seek emergency medical care, even if you start to feel better.\n\nYou’re likely to start by seeing your family health care provider. Or you may be referred directly to an allergy specialist.\n\n### What you can do\nPrepare for your appointment by making a list of:\n\n- **Symptoms,** including any that may seem unrelated to an allergy\n- **家族の歴史** of allergies and asthma, including specific types of allergies if you know them\n- **Medications,** vitamins, herbs or other supplements you’re taking, and the dosages\n- **Questions** to ask your health care provider\n\nQuestions related to shellfish allergy include:\n\n- Are my symptoms most likely due to an allergy?\n- Will I need any allergy tests?\n- Should I see an allergist?\n- Do I need to carry epinephrine?\n- Are there brochures or other educational materials I can have? What websites do you recommend?\n\nDon’t hesitate to ask other questions, as well.\n\n### What to expect from your doctor\nYour health care provider may ask you questions, such as:\n\n- What symptoms are you having? How severe are they?\n- When did you notice your symptoms?\n- Have you reacted to shellfish in the past?\n- What kind of shellfish did you eat?\n- How soon after eating shellfish did your symptoms occur?\n- What other foods did you eat during your meal? Don’t forget sauces, beverages and side dishes.\n- Did others who dined with you have similar symptoms?\n- Is there a history of allergy in your family?\n- Do you have other allergies, such as hay fever?\n- Do you have asthma or eczema (atopic dermatitis)?\n### What you can do in the meantime\nAvoid eating or touching any type of shellfish while waiting for your appointment.\n\n© 1998-2024 Mayo Foundation for Medical Education and Research (MFMER). All rights reserved.\n\n## We Make Health Possible\nAs East Central Indiana’s population grows, we’re putting health care where people need it most. Besides Hancock Regional Hospital, ranked as one of the nation’s safest by the Lown Hospital Index, our network includes more than **他 30 か所** 自宅や職場の近く。\n\n[Learn More about Hancock](https:\/\/www.hancockhealth.org\/ja\/about\/)\n\n[801 ノース ステート ストリート  インディアナ州グリーンフィールド 46140](https:\/\/www.google.com\/maps\/place\/801+N+State+St,+Greenfield,+IN+46140\/data=!4m2!3m1!1s0x886b31d8c0c72565:0x756b2134110d6c5c?sa=X&ved=2ahUKEwiCiOOLqv_9AhUgkIkEHYK4Aa0Q8gF6BAgNEAI)\n\n- [医師を探す](https:\/\/www.hancockhealth.org\/ja\/find-a-doctor\/)\n- [救急医療](https:\/\/www.hancockhealth.org\/ja\/healthcare-service\/emergency-immediate-care\/)\n- [所在地](https:\/\/www.hancockhealth.org\/ja\/find-a-location\/)\n- [私の請求書を支払う](https:\/\/www.hancockhealth.org\/ja\/patient-hub\/bill-pay\/)\n- [Price Transparency](https:\/\/apps.para-hcfs.com\/PTT\/FinalLinks\/Hancock_V3.aspx)\n- [患者ポータルへのログイン](https:\/\/www.hancockhealth.org\/ja\/patient-hub\/login\/)\n\n© 2026 Hancock Regional Hospital, All rights reserved.\n\n- [プライバシーポリシー](https:\/\/www.hancockhealth.org\/ja\/patient-hub\/patient-rights-privacy\/)\n- [HIPAA と患者の権利](https:\/\/www.hancockhealth.org\/ja\/patient-hub\/patient-rights-privacy\/)\n- [お問い合わせ](https:\/\/www.hancockhealth.org\/ja\/contact-us\/)\n\n[スペイン語](https:\/\/www.hancockhealth.org\/ja\/find-a-location\/hospital\/translation-services\/) [ドイツ語](https:\/\/www.hancockhealth.org\/ja\/find-a-location\/hospital\/translation-services\/) [繁体中文](https:\/\/www.hancockhealth.org\/ja\/find-a-location\/hospital\/translation-services\/) [ダイチュ](https:\/\/www.hancockhealth.org\/ja\/find-a-location\/hospital\/translation-services\/) [フランス語](https:\/\/www.hancockhealth.org\/ja\/find-a-location\/hospital\/translation-services\/) [ああ](https:\/\/www.hancockhealth.org\/ja\/find-a-location\/hospital\/translation-services\/) [オランダ](https:\/\/www.hancockhealth.org\/ja\/find-a-location\/hospital\/translation-services\/) [한국어](https:\/\/www.hancockhealth.org\/ja\/find-a-location\/hospital\/translation-services\/) [हिंदी](https:\/\/www.hancockhealth.org\/ja\/find-a-location\/hospital\/translation-services\/) [日本語](https:\/\/www.hancockhealth.org\/ja\/find-a-location\/hospital\/translation-services\/) [タガログ語](https:\/\/www.hancockhealth.org\/ja\/find-a-location\/hospital\/translation-services\/) [ਪੰਜਾਬੀ](https:\/\/www.hancockhealth.org\/ja\/find-a-location\/hospital\/translation-services\/) [မြန်မာဘာသာ](https:\/\/www.hancockhealth.org\/ja\/find-a-location\/hospital\/translation-services\/) [ポルスキ](https:\/\/www.hancockhealth.org\/ja\/find-a-location\/hospital\/translation-services\/) [ティエン・ヴィエット](https:\/\/www.hancockhealth.org\/ja\/find-a-location\/hospital\/translation-services\/) [Русский](https:\/\/www.hancockhealth.org\/ja\/find-a-location\/hospital\/translation-services\/)\n\n![](https:\/\/www.hancockhealth.org\/wp-content\/plugins\/translatepress-multilingual\/assets\/flags\/4x3\/ja.svg)JA\n\n[![](https:\/\/www.hancockhealth.org\/wp-content\/plugins\/translatepress-multilingual\/assets\/flags\/4x3\/en_US.svg)EN](https:\/\/www.hancockhealth.org\/mayo-health-library\/shellfish-allergy\/ \"EN\") [![](https:\/\/www.hancockhealth.org\/wp-content\/plugins\/translatepress-multilingual\/assets\/flags\/4x3\/es_MX.svg)ES](https:\/\/www.hancockhealth.org\/es\/mayo-health-library\/shellfish-allergy\/ \"ES\") [![](https:\/\/www.hancockhealth.org\/wp-content\/plugins\/translatepress-multilingual\/assets\/flags\/4x3\/de_DE.svg)DE](https:\/\/www.hancockhealth.org\/de\/mayo-health-library\/shellfish-allergy\/ \"DE\") [![](https:\/\/www.hancockhealth.org\/wp-content\/plugins\/translatepress-multilingual\/assets\/flags\/4x3\/fr_FR.svg)FR](https:\/\/www.hancockhealth.org\/fr\/mayo-health-library\/shellfish-allergy\/ \"FR\") [![](https:\/\/www.hancockhealth.org\/wp-content\/plugins\/translatepress-multilingual\/assets\/flags\/4x3\/zh_HK.svg)ZH](https:\/\/www.hancockhealth.org\/zh\/mayo-health-library\/shellfish-allergy\/ \"ZH\")\n\nWe use cookies to ensure we give you the best experience on our website. If you continue to use this site, we assume that you agree. To read more about our patient rights and privacy, [ここをクリック](https:\/\/www.hancockhealth.org\/ja\/patient-hub\/patient-rights-privacy\/).\n\nAccept\n\nDecline","attrs_readable_markdown":"Shellfish allergy is an atypical response by the body’s immune system to proteins in certain marine animals. Marine animals in the shellfish category include crustaceans and mollusks. Examples are shrimp, crabs, lobster, squid, oysters, scallops and snails.\n\nShellfish is a common food allergy. Some people with shellfish allergy react to all shellfish, while others react to only certain kinds. Reactions range from mild symptoms — such as hives or a stuffy nose — to severe and even life-threatening.\n\nIf you think you have shellfish allergy, talk to your health care provider. Tests can help confirm the allergy so you can take steps to avoid future reactions.\n\nShellfish allergy symptoms generally start within minutes to an hour after eating or having contact with shellfish. They may include:\n\n- Hives\n- Itchy, irritated skin\n- Nasal stuffiness (congestion)\n- Swelling of the lips, face, tongue and throat, or other parts of the body\n- Wheezing or trouble breathing\n- Coughing and choking or a tight feeling in the throat\n- Belly (abdominal) pain, diarrhea, nausea or vomiting\n- Dizziness, lightheadedness or fainting\n### Anaphylaxis\nAllergies can cause a severe, potentially life-threatening allergic reaction known as anaphylaxis. It can occur within seconds to minutes after exposure to something you’re allergic to — and worsens quickly.\n\nAn anaphylactic reaction to shellfish is a medical emergency. Anaphylaxis requires immediate treatment with an epinephrine (adrenaline) injection and a follow-up trip to the emergency room. If anaphylaxis isn’t treated right away, it can be fatal.\n\nAnaphylaxis causes the immune system to release a flood of chemicals that can cause you to go into shock. Signs and symptoms of anaphylaxis include:\n\n- A swollen throat or tongue or a tightness in the throat (airway constriction) that makes it difficult for you to breathe\n- Coughing, choking or wheezing with trouble breathing\n- Shock, with a severe drop in your blood pressure and a rapid or weak pulse\n- Severe skin rash, hives, itching or swelling\n- Nausea, vomiting or diarrhea\n- Dizziness, lightheadedness or fainting\n### When to see a doctor\nSeek emergency treatment if you develop signs or symptoms of anaphylaxis.\n\nSee a health care provider or allergy specialist if you have food allergy symptoms shortly after eating.\n\nAll food allergies are caused by an immune system overreaction. Your immune system identifies a harmless substance as being harmful. This substance is called an allergen. In shellfish allergy, your immune system mistakenly identifies a certain protein in shellfish as harmful. Your immune system is how your body protects itself, so it produces immunoglobulin E (IgE) antibodies to protect against this allergen. The next time you come in contact with the shellfish protein, these antibodies signal your immune system to release chemicals such as histamine into your bloodstream. This causes a reaction that leads to the symptoms of an allergic reaction.\n\n### Types of shellfish\nThere are several types of shellfish, each containing different proteins:\n\n- **Crustaceans** include crabs, lobster, crayfish, shrimp and prawn\n- **Mollusks** include squid, octopus, mussels, snails, clams, oysters, abalone and scallops\n\nAn allergy to crustaceans is the most common type. Some people are allergic to only one type of shellfish but can eat others. Other people with shellfish allergy must avoid all shellfish.\n\nAn allergy to fish — such as salmon, tuna or catfish — is a different seafood allergy from an allergy to shellfish. Some people who are allergic to shellfish may still be able to eat fish, or they could be allergic to both. Your health care provider can help you determine what is safe to eat.\n\nYou’re at increased risk of developing shellfish allergy if allergies of any type are common in your family.\n\nThough people of any age can develop shellfish allergy, it’s more common in adults. In fact, shellfish allergy is the most common food allergy in adults. Among adults, shellfish allergy is more common in women. Among children, shellfish allergy is more common in boys.\n\nIn severe cases, shellfish allergy can lead to anaphylaxis, a dangerous allergic reaction that can be life-threatening.\n\nWhen you have shellfish allergy, you may be at increased risk of anaphylaxis if you have:\n\n- 喘息\n- Allergic reactions to very small amounts of shellfish (extreme sensitivity)\n- History of food-induced anaphylaxis\n- Strong family history of allergy\n\nAnaphylaxis is treated with an emergency injection of epinephrine (adrenaline). If you are at risk of having a severe allergic reaction to shellfish, you always should carry injectable epinephrine (Auvi-Q, EpiPen, others).\n\nIf you have shellfish allergy, the only way to avoid an allergic reaction is to avoid all shellfish and products that contain shellfish. Even trace amounts of shellfish can cause a severe reaction in some people.\n\n### Avoiding shellfish\n- **Be cautious when dining out.** When dining at restaurants, always check to make sure that the pan, oil or utensils used for shellfish aren’t also used to prepare other foods, creating cross-contamination. It might be necessary to avoid eating at seafood restaurants, where there’s a high risk of cross-contamination.\n- **Read labels.** Cross-contamination can occur in stores where other food is processed or displayed near shellfish and during manufacturing. Shellfish may be in fish stock or seafood flavoring. Read food labels carefully.\n  Shellfish is not usually a hidden ingredient. Companies are required to label any product that contains crustacean shellfish or certain other foods that often cause allergic reactions. However, these regulations don’t apply to mollusks.\n- **Keep your distance.** You may need to completely avoid places where shellfish are prepared or processed. Some people react after touching shellfish or inhaling steam from cooking shellfish.\n### Be prepared\nIf you have shellfish allergy, talk with your health care provider about carrying emergency epinephrine and how to use it.\n\nConsider wearing a medical alert bracelet or necklace that lets others know you have a food allergy.\n\n### Iodine or radiocontrast dye\nOne thing you don’t need to worry about is if you’ll also be allergic to iodine or radiocontrast material that’s used in some imaging tests. Even though shellfish contain small amounts of iodine, shellfish allergy is unrelated to the reactions some people have to radiocontrast material or iodine.\n\nTo find out if you have shellfish allergy, your health care provider will ask about your symptoms and do a physical exam to find or rule out other medical problems.\n\nA history of allergic reactions shortly after exposure to shellfish can be a sign of shellfish allergy. But the symptoms could also be caused by something else, such as food poisoning.\n\nAllergy testing is the only sure way to tell what’s causing your symptoms, so your provider may recommend one or both of these tests:\n\n- **Skin prick test.** Small amounts of the proteins found in shellfish are pricked into skin on your arm or upper back. You’re then watched for an allergic reaction. If you’re allergic, you’ll develop a raised bump (hive) at the test site on your skin. This typically takes about 15 to 20 minutes. Allergy specialists usually are best equipped to perform allergy skin tests.\n- **Blood test.** A blood sample is sent to a lab to measure your immune system’s response to a specific allergen. This test measures your immune system’s response to shellfish proteins by measuring the amount of allergy-causing antibodies in your bloodstream, known as immunoglobulin E (IgE) antibodies.\n\nMedically supervised food challenges can be performed if the diagnosis still isn’t clear after allergy testing.\n\nThe only sure way to prevent an allergic reaction to shellfish is to avoid shellfish. But despite your best efforts, you may come into contact with shellfish.\n\nIf you have a severe allergic reaction to shellfish (anaphylaxis), you’ll likely need an emergency injection of epinephrine (adrenaline). If you’re at risk of anaphylaxis to shellfish, your health care provider can give you a prescription in advance and explain how and when to give the injection. Regularly check the expiration date on the packaging to make sure it’s current.\n\nCarry injectable epinephrine (Auvi-Q, EpiPen, others) with you at all times. Epinephrine is typically given at the first sign of an allergic reaction. A second dose may be needed if symptoms recur. After you use epinephrine, seek emergency medical care, even if you start to feel better.\n\nYou’re likely to start by seeing your family health care provider. Or you may be referred directly to an allergy specialist.\n\n### What you can do\nPrepare for your appointment by making a list of:\n\n- **Symptoms,** including any that may seem unrelated to an allergy\n- **家族の歴史** of allergies and asthma, including specific types of allergies if you know them\n- **Medications,** vitamins, herbs or other supplements you’re taking, and the dosages\n- **Questions** to ask your health care provider\n\nQuestions related to shellfish allergy include:\n\n- Are my symptoms most likely due to an allergy?\n- Will I need any allergy tests?\n- Should I see an allergist?\n- Do I need to carry epinephrine?\n- Are there brochures or other educational materials I can have? What websites do you recommend?\n\nDon’t hesitate to ask other questions, as well.\n\n### What to expect from your doctor\nYour health care provider may ask you questions, such as:\n\n- What symptoms are you having? How severe are they?\n- When did you notice your symptoms?\n- Have you reacted to shellfish in the past?\n- What kind of shellfish did you eat?\n- How soon after eating shellfish did your symptoms occur?\n- What other foods did you eat during your meal? Don’t forget sauces, beverages and side dishes.\n- Did others who dined with you have similar symptoms?\n- Is there a history of allergy in your family?\n- Do you have other allergies, such as hay fever?\n- Do you have asthma or eczema (atopic dermatitis)?\n### What you can do in the meantime\nAvoid eating or touching any type of shellfish while waiting for your appointment.\n\n© 1998-2024 Mayo Foundation for Medical Education and Research (MFMER). All rights reserved.","meta_canonical":null}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📄

INDEXABLE

✅

CRAWLED

1 month ago

🤖

ROBOTS ALLOWED

Page Info Filters

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	1.1 months ago
History drop	PASS	`isNull(history_drop_reason)`	No drop reason
Spam/ban	PASS	`fh_dont_index != 1 AND ml_spam_score = 0`	ml_spam_score=0
Canonical	PASS	`meta_canonical IS NULL OR = '' OR = src_unparsed`	Not set

Page Details

Property	Value
URL	https://www.hancockhealth.org/ja/mayo-health-library/shellfish-allergy/
Last Crawled	2026-03-19 20:46:46 (1 month ago)
First Indexed	2025-02-27 13:09:22 (1 year ago)
HTTP Status Code	200
Meta Title	Shellfish allergy - Hancock Health
Meta Description	null
Meta Canonical	null
Boilerpipe Text	Shellfish allergy is an atypical response by the body’s immune system to proteins in certain marine animals. Marine animals in the shellfish category include crustaceans and mollusks. Examples are shrimp, crabs, lobster, squid, oysters, scallops and snails. Shellfish is a common food allergy. Some people with shellfish allergy react to all shellfish, while others react to only certain kinds. Reactions range from mild symptoms — such as hives or a stuffy nose — to severe and even life-threatening. If you think you have shellfish allergy, talk to your health care provider. Tests can help confirm the allergy so you can take steps to avoid future reactions. Shellfish allergy symptoms generally start within minutes to an hour after eating or having contact with shellfish. They may include: Hives Itchy, irritated skin Nasal stuffiness (congestion) Swelling of the lips, face, tongue and throat, or other parts of the body Wheezing or trouble breathing Coughing and choking or a tight feeling in the throat Belly (abdominal) pain, diarrhea, nausea or vomiting Dizziness, lightheadedness or fainting Anaphylaxis Allergies can cause a severe, potentially life-threatening allergic reaction known as anaphylaxis. It can occur within seconds to minutes after exposure to something you’re allergic to — and worsens quickly. An anaphylactic reaction to shellfish is a medical emergency. Anaphylaxis requires immediate treatment with an epinephrine (adrenaline) injection and a follow-up trip to the emergency room. If anaphylaxis isn’t treated right away, it can be fatal. Anaphylaxis causes the immune system to release a flood of chemicals that can cause you to go into shock. Signs and symptoms of anaphylaxis include: A swollen throat or tongue or a tightness in the throat (airway constriction) that makes it difficult for you to breathe Coughing, choking or wheezing with trouble breathing Shock, with a severe drop in your blood pressure and a rapid or weak pulse Severe skin rash, hives, itching or swelling Nausea, vomiting or diarrhea Dizziness, lightheadedness or fainting When to see a doctor Seek emergency treatment if you develop signs or symptoms of anaphylaxis. See a health care provider or allergy specialist if you have food allergy symptoms shortly after eating. All food allergies are caused by an immune system overreaction. Your immune system identifies a harmless substance as being harmful. This substance is called an allergen. In shellfish allergy, your immune system mistakenly identifies a certain protein in shellfish as harmful. Your immune system is how your body protects itself, so it produces immunoglobulin E (IgE) antibodies to protect against this allergen. The next time you come in contact with the shellfish protein, these antibodies signal your immune system to release chemicals such as histamine into your bloodstream. This causes a reaction that leads to the symptoms of an allergic reaction. Types of shellfish There are several types of shellfish, each containing different proteins: Crustaceans include crabs, lobster, crayfish, shrimp and prawn Mollusks include squid, octopus, mussels, snails, clams, oysters, abalone and scallops An allergy to crustaceans is the most common type. Some people are allergic to only one type of shellfish but can eat others. Other people with shellfish allergy must avoid all shellfish. An allergy to fish — such as salmon, tuna or catfish — is a different seafood allergy from an allergy to shellfish. Some people who are allergic to shellfish may still be able to eat fish, or they could be allergic to both. Your health care provider can help you determine what is safe to eat. You’re at increased risk of developing shellfish allergy if allergies of any type are common in your family. Though people of any age can develop shellfish allergy, it’s more common in adults. In fact, shellfish allergy is the most common food allergy in adults. Among adults, shellfish allergy is more common in women. Among children, shellfish allergy is more common in boys. In severe cases, shellfish allergy can lead to anaphylaxis, a dangerous allergic reaction that can be life-threatening. When you have shellfish allergy, you may be at increased risk of anaphylaxis if you have: 喘息 Allergic reactions to very small amounts of shellfish (extreme sensitivity) History of food-induced anaphylaxis Strong family history of allergy Anaphylaxis is treated with an emergency injection of epinephrine (adrenaline). If you are at risk of having a severe allergic reaction to shellfish, you always should carry injectable epinephrine (Auvi-Q, EpiPen, others). If you have shellfish allergy, the only way to avoid an allergic reaction is to avoid all shellfish and products that contain shellfish. Even trace amounts of shellfish can cause a severe reaction in some people. Avoiding shellfish Be cautious when dining out. When dining at restaurants, always check to make sure that the pan, oil or utensils used for shellfish aren’t also used to prepare other foods, creating cross-contamination. It might be necessary to avoid eating at seafood restaurants, where there’s a high risk of cross-contamination. Read labels. Cross-contamination can occur in stores where other food is processed or displayed near shellfish and during manufacturing. Shellfish may be in fish stock or seafood flavoring. Read food labels carefully. Shellfish is not usually a hidden ingredient. Companies are required to label any product that contains crustacean shellfish or certain other foods that often cause allergic reactions. However, these regulations don’t apply to mollusks. Keep your distance. You may need to completely avoid places where shellfish are prepared or processed. Some people react after touching shellfish or inhaling steam from cooking shellfish. Be prepared If you have shellfish allergy, talk with your health care provider about carrying emergency epinephrine and how to use it. Consider wearing a medical alert bracelet or necklace that lets others know you have a food allergy. Iodine or radiocontrast dye One thing you don’t need to worry about is if you’ll also be allergic to iodine or radiocontrast material that’s used in some imaging tests. Even though shellfish contain small amounts of iodine, shellfish allergy is unrelated to the reactions some people have to radiocontrast material or iodine. To find out if you have shellfish allergy, your health care provider will ask about your symptoms and do a physical exam to find or rule out other medical problems. A history of allergic reactions shortly after exposure to shellfish can be a sign of shellfish allergy. But the symptoms could also be caused by something else, such as food poisoning. Allergy testing is the only sure way to tell what’s causing your symptoms, so your provider may recommend one or both of these tests: Skin prick test. Small amounts of the proteins found in shellfish are pricked into skin on your arm or upper back. You’re then watched for an allergic reaction. If you’re allergic, you’ll develop a raised bump (hive) at the test site on your skin. This typically takes about 15 to 20 minutes. Allergy specialists usually are best equipped to perform allergy skin tests. Blood test. A blood sample is sent to a lab to measure your immune system’s response to a specific allergen. This test measures your immune system’s response to shellfish proteins by measuring the amount of allergy-causing antibodies in your bloodstream, known as immunoglobulin E (IgE) antibodies. Medically supervised food challenges can be performed if the diagnosis still isn’t clear after allergy testing. The only sure way to prevent an allergic reaction to shellfish is to avoid shellfish. But despite your best efforts, you may come into contact with shellfish. If you have a severe allergic reaction to shellfish (anaphylaxis), you’ll likely need an emergency injection of epinephrine (adrenaline). If you’re at risk of anaphylaxis to shellfish, your health care provider can give you a prescription in advance and explain how and when to give the injection. Regularly check the expiration date on the packaging to make sure it’s current. Carry injectable epinephrine (Auvi-Q, EpiPen, others) with you at all times. Epinephrine is typically given at the first sign of an allergic reaction. A second dose may be needed if symptoms recur. After you use epinephrine, seek emergency medical care, even if you start to feel better. You’re likely to start by seeing your family health care provider. Or you may be referred directly to an allergy specialist. What you can do Prepare for your appointment by making a list of: Symptoms, including any that may seem unrelated to an allergy 家族の歴史 of allergies and asthma, including specific types of allergies if you know them Medications, vitamins, herbs or other supplements you’re taking, and the dosages Questions to ask your health care provider Questions related to shellfish allergy include: Are my symptoms most likely due to an allergy? Will I need any allergy tests? Should I see an allergist? Do I need to carry epinephrine? Are there brochures or other educational materials I can have? What websites do you recommend? Don’t hesitate to ask other questions, as well. What to expect from your doctor Your health care provider may ask you questions, such as: What symptoms are you having? How severe are they? When did you notice your symptoms? Have you reacted to shellfish in the past? What kind of shellfish did you eat? How soon after eating shellfish did your symptoms occur? What other foods did you eat during your meal? Don’t forget sauces, beverages and side dishes. Did others who dined with you have similar symptoms? Is there a history of allergy in your family? Do you have other allergies, such as hay fever? Do you have asthma or eczema (atopic dermatitis)? What you can do in the meantime Avoid eating or touching any type of shellfish while waiting for your appointment. © 1998-2024 Mayo Foundation for Medical Education and Research (MFMER). All rights reserved.
Markdown	VISITOR RESTRICTIONS Click Here\! ### VISITOR RESTRICTIONS To protect everyone, it has become necessary to limit visitations: - No one with flu-like symptoms may visit (fever, cough, runny nose, chills, and/or sore throat) - Visitation is restricted to immediate family as identified by the patient. - Visitors under the age of 18 are not recommended. - All guests, vendors, volunteers, and associates must be vigilant about proper handwashing and cover your cough/sneeze. Thank you for your understanding and cooperation 何を探していますか？ - [医師を探す](https://www.hancockhealth.org/ja/find-a-doctor/) - [私の請求書を支払う](https://www.hancockhealth.org/ja/patient-hub/bill-pay/) - [Schedule An Appointment](https://www.hancockhealth.org/ja/patient-hub/login/) 近いメニュー [(317) 462-5544 今すぐお電話ください。](tel:+13174625544 "今すぐお電話ください。") 何を探していますか？ - [患者ハブ](https://www.hancockhealth.org/ja/patient-hub/) - [アカウントログイン](https://www.hancockhealth.org/ja/patient-hub/login/) - [私の請求書を支払う](https://www.hancockhealth.org/ja/patient-hub/bill-pay/) - [請求と保険](https://www.hancockhealth.org/ja/patient-hub/billing-and-insurance/) - [サービスを調べる](https://www.hancockhealth.org/ja/healthcare-services/) - [医師を探す](https://www.hancockhealth.org/ja/find-a-doctor/) - [場所を探す](https://www.hancockhealth.org/ja/find-a-location/) - [救急医療](https://www.hancockhealth.org/ja/healthcare-service/emergency-immediate-care/) - [ウェルネス](https://www.hancockhealth.org/ja/wellness-education/) - [ウェルネスセンター](https://www.hancockhealth.org/ja/find-a-location/?Service=wellness-centers) - [コミュニティリソース](https://www.hancockhealth.org/ja/wellness-education/health-possible/community-resources/) - [クラスとサポートグループ](https://www.hancockhealth.org/ja/wellness-education/classes/) - [ブログ](https://www.hancockhealth.org/ja/wellness-education/health-possible/) - [キャリア](https://www.hancockhealth.org/ja/about/careers/) - [私たちについて](https://www.hancockhealth.org/ja/about/) - [財団](https://www.hancockhealth.org/ja/about/foundation/) - [メイヨークリニックケアネットワーク](https://www.hancockhealth.org/ja/about/mayoclinic/) - [品質と安全性](https://www.hancockhealth.org/ja/about/quality-and-safety/) - [お問い合わせ](https://www.hancockhealth.org/ja/contact-us/) - [家](https://www.hancockhealth.org/ja/) - / - [Health Library](https://www.hancockhealth.org/ja/health-library/) - / - Shellfish allergy [Back to Diseases & Conditions](https://www.hancockhealth.org/ja/health-library/diseases-conditions/) # Shellfish allergy Shellfish allergy is an atypical response by the body’s immune system to proteins in certain marine animals. Marine animals in the shellfish category include crustaceans and mollusks. Examples are shrimp, crabs, lobster, squid, oysters, scallops and snails. Shellfish is a common food allergy. Some people with shellfish allergy react to all shellfish, while others react to only certain kinds. Reactions range from mild symptoms — such as hives or a stuffy nose — to severe and even life-threatening. If you think you have shellfish allergy, talk to your health care provider. Tests can help confirm the allergy so you can take steps to avoid future reactions. Shellfish allergy symptoms generally start within minutes to an hour after eating or having contact with shellfish. They may include: - Hives - Itchy, irritated skin - Nasal stuffiness (congestion) - Swelling of the lips, face, tongue and throat, or other parts of the body - Wheezing or trouble breathing - Coughing and choking or a tight feeling in the throat - Belly (abdominal) pain, diarrhea, nausea or vomiting - Dizziness, lightheadedness or fainting ### Anaphylaxis Allergies can cause a severe, potentially life-threatening allergic reaction known as anaphylaxis. It can occur within seconds to minutes after exposure to something you’re allergic to — and worsens quickly. An anaphylactic reaction to shellfish is a medical emergency. Anaphylaxis requires immediate treatment with an epinephrine (adrenaline) injection and a follow-up trip to the emergency room. If anaphylaxis isn’t treated right away, it can be fatal. Anaphylaxis causes the immune system to release a flood of chemicals that can cause you to go into shock. Signs and symptoms of anaphylaxis include: - A swollen throat or tongue or a tightness in the throat (airway constriction) that makes it difficult for you to breathe - Coughing, choking or wheezing with trouble breathing - Shock, with a severe drop in your blood pressure and a rapid or weak pulse - Severe skin rash, hives, itching or swelling - Nausea, vomiting or diarrhea - Dizziness, lightheadedness or fainting ### When to see a doctor Seek emergency treatment if you develop signs or symptoms of anaphylaxis. See a health care provider or allergy specialist if you have food allergy symptoms shortly after eating. All food allergies are caused by an immune system overreaction. Your immune system identifies a harmless substance as being harmful. This substance is called an allergen. In shellfish allergy, your immune system mistakenly identifies a certain protein in shellfish as harmful. Your immune system is how your body protects itself, so it produces immunoglobulin E (IgE) antibodies to protect against this allergen. The next time you come in contact with the shellfish protein, these antibodies signal your immune system to release chemicals such as histamine into your bloodstream. This causes a reaction that leads to the symptoms of an allergic reaction. ### Types of shellfish There are several types of shellfish, each containing different proteins: - Crustaceans include crabs, lobster, crayfish, shrimp and prawn - Mollusks include squid, octopus, mussels, snails, clams, oysters, abalone and scallops An allergy to crustaceans is the most common type. Some people are allergic to only one type of shellfish but can eat others. Other people with shellfish allergy must avoid all shellfish. An allergy to fish — such as salmon, tuna or catfish — is a different seafood allergy from an allergy to shellfish. Some people who are allergic to shellfish may still be able to eat fish, or they could be allergic to both. Your health care provider can help you determine what is safe to eat. You’re at increased risk of developing shellfish allergy if allergies of any type are common in your family. Though people of any age can develop shellfish allergy, it’s more common in adults. In fact, shellfish allergy is the most common food allergy in adults. Among adults, shellfish allergy is more common in women. Among children, shellfish allergy is more common in boys. In severe cases, shellfish allergy can lead to anaphylaxis, a dangerous allergic reaction that can be life-threatening. When you have shellfish allergy, you may be at increased risk of anaphylaxis if you have: - 喘息 - Allergic reactions to very small amounts of shellfish (extreme sensitivity) - History of food-induced anaphylaxis - Strong family history of allergy Anaphylaxis is treated with an emergency injection of epinephrine (adrenaline). If you are at risk of having a severe allergic reaction to shellfish, you always should carry injectable epinephrine (Auvi-Q, EpiPen, others). If you have shellfish allergy, the only way to avoid an allergic reaction is to avoid all shellfish and products that contain shellfish. Even trace amounts of shellfish can cause a severe reaction in some people. ### Avoiding shellfish - Be cautious when dining out. When dining at restaurants, always check to make sure that the pan, oil or utensils used for shellfish aren’t also used to prepare other foods, creating cross-contamination. It might be necessary to avoid eating at seafood restaurants, where there’s a high risk of cross-contamination. - Read labels. Cross-contamination can occur in stores where other food is processed or displayed near shellfish and during manufacturing. Shellfish may be in fish stock or seafood flavoring. Read food labels carefully. Shellfish is not usually a hidden ingredient. Companies are required to label any product that contains crustacean shellfish or certain other foods that often cause allergic reactions. However, these regulations don’t apply to mollusks. - Keep your distance. You may need to completely avoid places where shellfish are prepared or processed. Some people react after touching shellfish or inhaling steam from cooking shellfish. ### Be prepared If you have shellfish allergy, talk with your health care provider about carrying emergency epinephrine and how to use it. Consider wearing a medical alert bracelet or necklace that lets others know you have a food allergy. ### Iodine or radiocontrast dye One thing you don’t need to worry about is if you’ll also be allergic to iodine or radiocontrast material that’s used in some imaging tests. Even though shellfish contain small amounts of iodine, shellfish allergy is unrelated to the reactions some people have to radiocontrast material or iodine. To find out if you have shellfish allergy, your health care provider will ask about your symptoms and do a physical exam to find or rule out other medical problems. A history of allergic reactions shortly after exposure to shellfish can be a sign of shellfish allergy. But the symptoms could also be caused by something else, such as food poisoning. Allergy testing is the only sure way to tell what’s causing your symptoms, so your provider may recommend one or both of these tests: - Skin prick test. Small amounts of the proteins found in shellfish are pricked into skin on your arm or upper back. You’re then watched for an allergic reaction. If you’re allergic, you’ll develop a raised bump (hive) at the test site on your skin. This typically takes about 15 to 20 minutes. Allergy specialists usually are best equipped to perform allergy skin tests. - Blood test. A blood sample is sent to a lab to measure your immune system’s response to a specific allergen. This test measures your immune system’s response to shellfish proteins by measuring the amount of allergy-causing antibodies in your bloodstream, known as immunoglobulin E (IgE) antibodies. Medically supervised food challenges can be performed if the diagnosis still isn’t clear after allergy testing. The only sure way to prevent an allergic reaction to shellfish is to avoid shellfish. But despite your best efforts, you may come into contact with shellfish. If you have a severe allergic reaction to shellfish (anaphylaxis), you’ll likely need an emergency injection of epinephrine (adrenaline). If you’re at risk of anaphylaxis to shellfish, your health care provider can give you a prescription in advance and explain how and when to give the injection. Regularly check the expiration date on the packaging to make sure it’s current. Carry injectable epinephrine (Auvi-Q, EpiPen, others) with you at all times. Epinephrine is typically given at the first sign of an allergic reaction. A second dose may be needed if symptoms recur. After you use epinephrine, seek emergency medical care, even if you start to feel better. You’re likely to start by seeing your family health care provider. Or you may be referred directly to an allergy specialist. ### What you can do Prepare for your appointment by making a list of: - Symptoms, including any that may seem unrelated to an allergy - 家族の歴史 of allergies and asthma, including specific types of allergies if you know them - Medications, vitamins, herbs or other supplements you’re taking, and the dosages - Questions to ask your health care provider Questions related to shellfish allergy include: - Are my symptoms most likely due to an allergy? - Will I need any allergy tests? - Should I see an allergist? - Do I need to carry epinephrine? - Are there brochures or other educational materials I can have? What websites do you recommend? Don’t hesitate to ask other questions, as well. ### What to expect from your doctor Your health care provider may ask you questions, such as: - What symptoms are you having? How severe are they? - When did you notice your symptoms? - Have you reacted to shellfish in the past? - What kind of shellfish did you eat? - How soon after eating shellfish did your symptoms occur? - What other foods did you eat during your meal? Don’t forget sauces, beverages and side dishes. - Did others who dined with you have similar symptoms? - Is there a history of allergy in your family? - Do you have other allergies, such as hay fever? - Do you have asthma or eczema (atopic dermatitis)? ### What you can do in the meantime Avoid eating or touching any type of shellfish while waiting for your appointment. © 1998-2024 Mayo Foundation for Medical Education and Research (MFMER). All rights reserved. ## We Make Health Possible As East Central Indiana’s population grows, we’re putting health care where people need it most. Besides Hancock Regional Hospital, ranked as one of the nation’s safest by the Lown Hospital Index, our network includes more than 他 30 か所自宅や職場の近く。 [Learn More about Hancock](https://www.hancockhealth.org/ja/about/) [801 ノースステートストリートインディアナ州グリーンフィールド 46140](https://www.google.com/maps/place/801+N+State+St,+Greenfield,+IN+46140/data=!4m2!3m1!1s0x886b31d8c0c72565:0x756b2134110d6c5c?sa=X&ved=2ahUKEwiCiOOLqv_9AhUgkIkEHYK4Aa0Q8gF6BAgNEAI) - [医師を探す](https://www.hancockhealth.org/ja/find-a-doctor/) - [救急医療](https://www.hancockhealth.org/ja/healthcare-service/emergency-immediate-care/) - [所在地](https://www.hancockhealth.org/ja/find-a-location/) - [私の請求書を支払う](https://www.hancockhealth.org/ja/patient-hub/bill-pay/) - [Price Transparency](https://apps.para-hcfs.com/PTT/FinalLinks/Hancock_V3.aspx) - [患者ポータルへのログイン](https://www.hancockhealth.org/ja/patient-hub/login/) © 2026 Hancock Regional Hospital, All rights reserved. - [プライバシーポリシー](https://www.hancockhealth.org/ja/patient-hub/patient-rights-privacy/) - [HIPAA と患者の権利](https://www.hancockhealth.org/ja/patient-hub/patient-rights-privacy/) - [お問い合わせ](https://www.hancockhealth.org/ja/contact-us/) [スペイン語](https://www.hancockhealth.org/ja/find-a-location/hospital/translation-services/) [ドイツ語](https://www.hancockhealth.org/ja/find-a-location/hospital/translation-services/) [繁体中文](https://www.hancockhealth.org/ja/find-a-location/hospital/translation-services/) [ダイチュ](https://www.hancockhealth.org/ja/find-a-location/hospital/translation-services/) [フランス語](https://www.hancockhealth.org/ja/find-a-location/hospital/translation-services/) [ああ](https://www.hancockhealth.org/ja/find-a-location/hospital/translation-services/) [オランダ](https://www.hancockhealth.org/ja/find-a-location/hospital/translation-services/) [한국어](https://www.hancockhealth.org/ja/find-a-location/hospital/translation-services/) [हिंदी](https://www.hancockhealth.org/ja/find-a-location/hospital/translation-services/) [日本語](https://www.hancockhealth.org/ja/find-a-location/hospital/translation-services/) [タガログ語](https://www.hancockhealth.org/ja/find-a-location/hospital/translation-services/) [ਪੰਜਾਬੀ](https://www.hancockhealth.org/ja/find-a-location/hospital/translation-services/) [မြန်မာဘာသာ](https://www.hancockhealth.org/ja/find-a-location/hospital/translation-services/) [ポルスキ](https://www.hancockhealth.org/ja/find-a-location/hospital/translation-services/) [ティエン・ヴィエット](https://www.hancockhealth.org/ja/find-a-location/hospital/translation-services/) [Русский](https://www.hancockhealth.org/ja/find-a-location/hospital/translation-services/) ![](https://www.hancockhealth.org/wp-content/plugins/translatepress-multilingual/assets/flags/4x3/ja.svg)JA [![](https://www.hancockhealth.org/wp-content/plugins/translatepress-multilingual/assets/flags/4x3/en_US.svg)EN](https://www.hancockhealth.org/mayo-health-library/shellfish-allergy/ "EN") [![](https://www.hancockhealth.org/wp-content/plugins/translatepress-multilingual/assets/flags/4x3/es_MX.svg)ES](https://www.hancockhealth.org/es/mayo-health-library/shellfish-allergy/ "ES") [![](https://www.hancockhealth.org/wp-content/plugins/translatepress-multilingual/assets/flags/4x3/de_DE.svg)DE](https://www.hancockhealth.org/de/mayo-health-library/shellfish-allergy/ "DE") [![](https://www.hancockhealth.org/wp-content/plugins/translatepress-multilingual/assets/flags/4x3/fr_FR.svg)FR](https://www.hancockhealth.org/fr/mayo-health-library/shellfish-allergy/ "FR") [![](https://www.hancockhealth.org/wp-content/plugins/translatepress-multilingual/assets/flags/4x3/zh_HK.svg)ZH](https://www.hancockhealth.org/zh/mayo-health-library/shellfish-allergy/ "ZH") We use cookies to ensure we give you the best experience on our website. If you continue to use this site, we assume that you agree. To read more about our patient rights and privacy, [ここをクリック](https://www.hancockhealth.org/ja/patient-hub/patient-rights-privacy/). Accept Decline
Readable Markdown	Shellfish allergy is an atypical response by the body’s immune system to proteins in certain marine animals. Marine animals in the shellfish category include crustaceans and mollusks. Examples are shrimp, crabs, lobster, squid, oysters, scallops and snails. Shellfish is a common food allergy. Some people with shellfish allergy react to all shellfish, while others react to only certain kinds. Reactions range from mild symptoms — such as hives or a stuffy nose — to severe and even life-threatening. If you think you have shellfish allergy, talk to your health care provider. Tests can help confirm the allergy so you can take steps to avoid future reactions. Shellfish allergy symptoms generally start within minutes to an hour after eating or having contact with shellfish. They may include: - Hives - Itchy, irritated skin - Nasal stuffiness (congestion) - Swelling of the lips, face, tongue and throat, or other parts of the body - Wheezing or trouble breathing - Coughing and choking or a tight feeling in the throat - Belly (abdominal) pain, diarrhea, nausea or vomiting - Dizziness, lightheadedness or fainting ### Anaphylaxis Allergies can cause a severe, potentially life-threatening allergic reaction known as anaphylaxis. It can occur within seconds to minutes after exposure to something you’re allergic to — and worsens quickly. An anaphylactic reaction to shellfish is a medical emergency. Anaphylaxis requires immediate treatment with an epinephrine (adrenaline) injection and a follow-up trip to the emergency room. If anaphylaxis isn’t treated right away, it can be fatal. Anaphylaxis causes the immune system to release a flood of chemicals that can cause you to go into shock. Signs and symptoms of anaphylaxis include: - A swollen throat or tongue or a tightness in the throat (airway constriction) that makes it difficult for you to breathe - Coughing, choking or wheezing with trouble breathing - Shock, with a severe drop in your blood pressure and a rapid or weak pulse - Severe skin rash, hives, itching or swelling - Nausea, vomiting or diarrhea - Dizziness, lightheadedness or fainting ### When to see a doctor Seek emergency treatment if you develop signs or symptoms of anaphylaxis. See a health care provider or allergy specialist if you have food allergy symptoms shortly after eating. All food allergies are caused by an immune system overreaction. Your immune system identifies a harmless substance as being harmful. This substance is called an allergen. In shellfish allergy, your immune system mistakenly identifies a certain protein in shellfish as harmful. Your immune system is how your body protects itself, so it produces immunoglobulin E (IgE) antibodies to protect against this allergen. The next time you come in contact with the shellfish protein, these antibodies signal your immune system to release chemicals such as histamine into your bloodstream. This causes a reaction that leads to the symptoms of an allergic reaction. ### Types of shellfish There are several types of shellfish, each containing different proteins: - Crustaceans include crabs, lobster, crayfish, shrimp and prawn - Mollusks include squid, octopus, mussels, snails, clams, oysters, abalone and scallops An allergy to crustaceans is the most common type. Some people are allergic to only one type of shellfish but can eat others. Other people with shellfish allergy must avoid all shellfish. An allergy to fish — such as salmon, tuna or catfish — is a different seafood allergy from an allergy to shellfish. Some people who are allergic to shellfish may still be able to eat fish, or they could be allergic to both. Your health care provider can help you determine what is safe to eat. You’re at increased risk of developing shellfish allergy if allergies of any type are common in your family. Though people of any age can develop shellfish allergy, it’s more common in adults. In fact, shellfish allergy is the most common food allergy in adults. Among adults, shellfish allergy is more common in women. Among children, shellfish allergy is more common in boys. In severe cases, shellfish allergy can lead to anaphylaxis, a dangerous allergic reaction that can be life-threatening. When you have shellfish allergy, you may be at increased risk of anaphylaxis if you have: - 喘息 - Allergic reactions to very small amounts of shellfish (extreme sensitivity) - History of food-induced anaphylaxis - Strong family history of allergy Anaphylaxis is treated with an emergency injection of epinephrine (adrenaline). If you are at risk of having a severe allergic reaction to shellfish, you always should carry injectable epinephrine (Auvi-Q, EpiPen, others). If you have shellfish allergy, the only way to avoid an allergic reaction is to avoid all shellfish and products that contain shellfish. Even trace amounts of shellfish can cause a severe reaction in some people. ### Avoiding shellfish - Be cautious when dining out. When dining at restaurants, always check to make sure that the pan, oil or utensils used for shellfish aren’t also used to prepare other foods, creating cross-contamination. It might be necessary to avoid eating at seafood restaurants, where there’s a high risk of cross-contamination. - Read labels. Cross-contamination can occur in stores where other food is processed or displayed near shellfish and during manufacturing. Shellfish may be in fish stock or seafood flavoring. Read food labels carefully. Shellfish is not usually a hidden ingredient. Companies are required to label any product that contains crustacean shellfish or certain other foods that often cause allergic reactions. However, these regulations don’t apply to mollusks. - Keep your distance. You may need to completely avoid places where shellfish are prepared or processed. Some people react after touching shellfish or inhaling steam from cooking shellfish. ### Be prepared If you have shellfish allergy, talk with your health care provider about carrying emergency epinephrine and how to use it. Consider wearing a medical alert bracelet or necklace that lets others know you have a food allergy. ### Iodine or radiocontrast dye One thing you don’t need to worry about is if you’ll also be allergic to iodine or radiocontrast material that’s used in some imaging tests. Even though shellfish contain small amounts of iodine, shellfish allergy is unrelated to the reactions some people have to radiocontrast material or iodine. To find out if you have shellfish allergy, your health care provider will ask about your symptoms and do a physical exam to find or rule out other medical problems. A history of allergic reactions shortly after exposure to shellfish can be a sign of shellfish allergy. But the symptoms could also be caused by something else, such as food poisoning. Allergy testing is the only sure way to tell what’s causing your symptoms, so your provider may recommend one or both of these tests: - Skin prick test. Small amounts of the proteins found in shellfish are pricked into skin on your arm or upper back. You’re then watched for an allergic reaction. If you’re allergic, you’ll develop a raised bump (hive) at the test site on your skin. This typically takes about 15 to 20 minutes. Allergy specialists usually are best equipped to perform allergy skin tests. - Blood test. A blood sample is sent to a lab to measure your immune system’s response to a specific allergen. This test measures your immune system’s response to shellfish proteins by measuring the amount of allergy-causing antibodies in your bloodstream, known as immunoglobulin E (IgE) antibodies. Medically supervised food challenges can be performed if the diagnosis still isn’t clear after allergy testing. The only sure way to prevent an allergic reaction to shellfish is to avoid shellfish. But despite your best efforts, you may come into contact with shellfish. If you have a severe allergic reaction to shellfish (anaphylaxis), you’ll likely need an emergency injection of epinephrine (adrenaline). If you’re at risk of anaphylaxis to shellfish, your health care provider can give you a prescription in advance and explain how and when to give the injection. Regularly check the expiration date on the packaging to make sure it’s current. Carry injectable epinephrine (Auvi-Q, EpiPen, others) with you at all times. Epinephrine is typically given at the first sign of an allergic reaction. A second dose may be needed if symptoms recur. After you use epinephrine, seek emergency medical care, even if you start to feel better. You’re likely to start by seeing your family health care provider. Or you may be referred directly to an allergy specialist. ### What you can do Prepare for your appointment by making a list of: - Symptoms, including any that may seem unrelated to an allergy - 家族の歴史 of allergies and asthma, including specific types of allergies if you know them - Medications, vitamins, herbs or other supplements you’re taking, and the dosages - Questions to ask your health care provider Questions related to shellfish allergy include: - Are my symptoms most likely due to an allergy? - Will I need any allergy tests? - Should I see an allergist? - Do I need to carry epinephrine? - Are there brochures or other educational materials I can have? What websites do you recommend? Don’t hesitate to ask other questions, as well. ### What to expect from your doctor Your health care provider may ask you questions, such as: - What symptoms are you having? How severe are they? - When did you notice your symptoms? - Have you reacted to shellfish in the past? - What kind of shellfish did you eat? - How soon after eating shellfish did your symptoms occur? - What other foods did you eat during your meal? Don’t forget sauces, beverages and side dishes. - Did others who dined with you have similar symptoms? - Is there a history of allergy in your family? - Do you have other allergies, such as hay fever? - Do you have asthma or eczema (atopic dermatitis)? ### What you can do in the meantime Avoid eating or touching any type of shellfish while waiting for your appointment. © 1998-2024 Mayo Foundation for Medical Education and Research (MFMER). All rights reserved.
Shard	123 (laksa)
Root Hash	793357625386019723
Unparsed URL	org,hancockhealth!www,/ja/mayo-health-library/shellfish-allergy/ s443