🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 98 (from laksa106)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa098.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.healthline.com/health/anosmia\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.healthline.com/health/anosmia\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.healthline.com\/health\/anosmia","crawl_time":1775049128,"first_indexed_time":1508494460,"http_code":200,"src_unparsed":"com,healthline!www,\/health\/anosmia s443","src_root_hash":"11478817528691466898","history_drop_reason":null,"meta_title":"Anosmia: Causes, Complications, and Treatment","meta_descriptions":["Anosmia is an absent or decreased sense of smell. Read more on what causes it and how to treat it."],"attrs_boilerpipe_text":"Overview\nAnosmia is the partial or complete loss of the sense of smell. This loss may be temporary or permanent. Common conditions that irritate the nose’s lining, such as allergies or a cold, can lead to temporary anosmia.\nMore serious conditions that affect the brain or nerves, such as brain tumors or head trauma, can cause permanent loss of smell. Old age sometimes causes anosmia.\nAnosmia usually isn’t serious, but it can have a profound effect on a person’s quality of life.\nPeople with anosmia may not be able to fully taste foods and may lose interest in eating. This can lead to weight loss or malnutrition. Anosmia can also lead to depression because it may impair one’s ability to smell or taste pleasurable foods.\nAnosmia is frequently caused by a swelling or blockage in the nose that prevents odors from getting to the top of the nose. Anosmia is sometimes caused by a problem with the system that sends signals from the nose to the brain.\nBelow are the main causes of anosmia:\nIrritation to the mucus membranes lining the nose\nThis can result from:\nsinus infections\ncommon colds\nsmoking\nthe\nflu\n, or influenza\nallergies (\nallergic rhinitis\n)\nchronic congestion not related to allergies (nonallergic rhinitis)\nA cold is the most common cause of partial and temporary loss of smell. In these cases, the anosmia will go away on its own.\nBlockage of the nasal passages\nLoss of smell can occur if something is physically blocking the passage of air into the nose. This may include:\ntumors\nnasal polyps\nbone deformities inside the nose or a nasal septum\nBrain or nerve damage\nThere are receptors inside the nose that send information through nerves to the brain. Anosmia can occur if any part of this pathway is damaged. There are many conditions that can cause this damage, including:\nold age\nAlzheimer’s disease\nbrain tumors\nHuntington’s disease\nhormonal problems\nunderactive thyroid\nmedications, including some antibiotics and high blood pressure medications\nmultiple sclerosis\nParkinson’s disease\nschizophrenia\nepilepsy\ndiabetes\nexposure to chemicals that burn the inside of your nose\nbrain or head injury\nbrain surgery\nmalnutrition\nand vitamin deficiencies\nradiation therapy\nlong-term\nalcoholism\nstroke\nIn rare cases, people are born without a sense of smell due to a genetic condition. This is called congenital anosmia.\nThe loss of smell is difficult to measure. Your doctor may ask you some questions about your current symptoms, examine your nose, perform a complete physical examination, and ask about your health history.\nThey may ask questions about when the problem started, if all or only some types of odors are affected, and whether or not you can taste food. Depending on your answers, your doctor may also perform one or more of the following tests:\nCT scans\n, which use X-rays to create a detailed image of the brain\nMRI scans\n, which uses radio waves and magnets to view the brain\nX-ray\nof the skull\nnasal endoscopy to look inside your nose\nPeople with anosmia may lose interest in food and eating, leading to malnutrition and weight loss.\nPeople with anosmia should make sure to have functioning smoke alarms in their homes at all times. They should also be cautious with food storage and the use of natural gas because they may have trouble detecting spoiled foods and gas leaks.\nRecommended precautions include:\nproperly labeling foods with expiration dates\nreading labels on chemicals like kitchen cleaners and insecticides\nusing electric appliances\nTreatment depends on the cause. If the loss of smell occurs with a cold, allergy, or sinus infection, it typically will clear up on its own in a few days. You should consult your doctor if the anosmia doesn’t clear up once the cold or allergy symptoms have subsided.\nTreatments that may help resolve anosmia caused by nasal irritation include:\ndecongestants\nantihistamines\nsteroid nasal sprays\nantibiotics, for bacterial infections\nreducing exposure to nasal irritants and allergens\ncessation of smoking\nLoss of smell caused by nasal obstruction can be treated by removing whatever is obstructing your nasal passage. This removal may involve a procedure to remove nasal polyps, straighten the nasal septum, or clear out the sinuses.\nOlder people are more susceptible to losing their sense of smell permanently.\nThere is no treatment currently available for people with congenital anosmia.\nPeople with a partial loss of their sense of smell can add concentrated flavoring agents to food to improve their enjoyment.","attrs_markdown":"- Health Conditions\n  Health Conditions\n  \n  [All](https:\/\/www.healthline.com\/directory\/topics)\n  \n  - [Breast Cancer](https:\/\/www.healthline.com\/breast-cancer)\n  - [Cancer Care](https:\/\/www.healthline.com\/cancer-care)\n  - [Caregiving for Alzheimer's Disease](https:\/\/www.healthline.com\/alzheimers-disease)\n  - [Chronic Kidney Disease](https:\/\/www.healthline.com\/ckd)\n  - [Chronic Obstructive Pulmonary Disease (COPD)](https:\/\/www.healthline.com\/copd)\n  - [Digestive Health](https:\/\/www.healthline.com\/digestive-health)\n  - [Eye Health](https:\/\/www.healthline.com\/eye-health)\n  - 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Join Bezzy on the web or mobile app.\n  \n  [All](https:\/\/www.bezzy.com\/?utm_source=healthline&utm_medium=nav-bar-connections)\n  \n  - [![](https:\/\/media.post.rvohealth.io\/wp-content\/uploads\/2022\/01\/Bezzy-Inflammatory-Bowel-Disease.png) Inflammatory Bowel Disease](https:\/\/www.bezzyibd.com\/?utm_source=healthline&utm_medium=hl-nav-bar-connections)\n  - [![](https:\/\/media.post.rvohealth.io\/wp-content\/uploads\/2022\/01\/Bezzy-Multiple-Sclerosis.png) Multiple Sclerosis](https:\/\/www.bezzyms.com\/?utm_source=healthline&utm_medium=hl-nav-bar-connections)\n  - [![](https:\/\/media.post.rvohealth.io\/wp-content\/uploads\/2024\/11\/Bezzy-DEP-Icon-Circle.png) Depression](https:\/\/www.bezzydepression.com\/?utm_source=healthline&utm_medium=hl-nav-bar-connections)\n  - [![](https:\/\/media.post.rvohealth.io\/wp-content\/uploads\/2025\/01\/Bezzy-MIG-Icon-Circle.png) Migraine](https:\/\/www.bezzymigraine.com\/?utm_source=healthline&utm_medium=hl-nav-bar-connections)\n  - [![](https:\/\/media.post.rvohealth.io\/wp-content\/uploads\/2024\/12\/Bezzy-T2D-Icon-Circle.png) Type 2 Diabetes](https:\/\/www.bezzyt2d.com\/?utm_source=healthline&utm_medium=hl-nav-bar-connections)\n  - [![](https:\/\/media.post.rvohealth.io\/wp-content\/uploads\/2022\/04\/Bezzy-PsO.png) Psoriasis](https:\/\/www.bezzypsoriasis.com\/?utm_source=healthline&utm_medium=hl-nav-bar-connections)\n  \n  Follow us on social media\n  \n  Can't get enough? Connect with us for all things health.\n\nSubscribe\n\n[Weight Management](https:\/\/www.healthline.com\/weight-management)\n\n- [Nutrition](https:\/\/www.healthline.com\/weight-management\/nutrition)\n- [Fitness](https:\/\/www.healthline.com\/weight-management\/fitness)\n- [Mental Well-Being](https:\/\/www.healthline.com\/weight-management\/well-being)\n- [Sleep](https:\/\/www.healthline.com\/weight-management\/sleep)\n- [Healthy Habits](https:\/\/www.healthline.com\/weight-management\/healthy-habits)\n- Treatment\n  - [Treatment & Medications](https:\/\/www.healthline.com\/weight-management\/treatment-medication)\n  - [GLP-1s](https:\/\/www.healthline.com\/weight-management\/treatment-medication\/glp-1s)\n  - [Alternatives to GLP-1s](https:\/\/www.healthline.com\/weight-management\/treatment-medication\/alternatives-to-glp-1s)\n  - [Surgery & Procedures](https:\/\/www.healthline.com\/weight-management\/treatment-medication\/surgery-procedures)\n- [Apps](https:\/\/www.healthline.com\/weight-management\/apps-products)\n\n# What Is Anosmia?\n![](https:\/\/i0.wp.com\/post.healthline.com\/wp-content\/uploads\/2022\/01\/Alana-Biggers-500x500-Bio.png?w=105&h=105)\n\n[Medically reviewed]() by [Alana Biggers, M.D., MPH]() — Written by [Jacquelyn Cafasso]() —  [Updated on August 30, 2019]()\n\n- [Causes](https:\/\/www.healthline.com\/health\/anosmia#causes)\n- [Diagnosis](https:\/\/www.healthline.com\/health\/anosmia#diagnosis)\n- [Complications](https:\/\/www.healthline.com\/health\/anosmia#complications)\n- [Treatment](https:\/\/www.healthline.com\/health\/anosmia#treatment)\n\nOverview\n\nAnosmia is the partial or complete loss of the sense of smell. This loss may be temporary or permanent. Common conditions that irritate the nose’s lining, such as allergies or a cold, can lead to temporary anosmia.\n\nMore serious conditions that affect the brain or nerves, such as brain tumors or head trauma, can cause permanent loss of smell. Old age sometimes causes anosmia.\n\nAnosmia usually isn’t serious, but it can have a profound effect on a person’s quality of life.\n\nPeople with anosmia may not be able to fully taste foods and may lose interest in eating. This can lead to weight loss or malnutrition. Anosmia can also lead to depression because it may impair one’s ability to smell or taste pleasurable foods.\n\n## [What causes anosmia?]()\nAnosmia is frequently caused by a swelling or blockage in the nose that prevents odors from getting to the top of the nose. Anosmia is sometimes caused by a problem with the system that sends signals from the nose to the brain.\n\nBelow are the main causes of anosmia:\n\n### Irritation to the mucus membranes lining the nose\nThis can result from:\n\n- sinus infections\n- [common colds](https:\/\/www.healthline.com\/health\/cold-flu\/head-cold)\n- smoking\n- the [flu](https:\/\/www.healthline.com\/health\/flu-causes), or influenza\n- allergies ([allergic rhinitis](https:\/\/www.healthline.com\/health\/allergic-rhinitis))\n- chronic congestion not related to allergies (nonallergic rhinitis)\n\nA cold is the most common cause of partial and temporary loss of smell. In these cases, the anosmia will go away on its own.\n\n### Blockage of the nasal passages\nLoss of smell can occur if something is physically blocking the passage of air into the nose. This may include:\n\n- tumors\n- [nasal polyps](https:\/\/www.healthline.com\/health\/nasal-polyps)\n- bone deformities inside the nose or a nasal septum\n### Brain or nerve damage\nThere are receptors inside the nose that send information through nerves to the brain. Anosmia can occur if any part of this pathway is damaged. There are many conditions that can cause this damage, including:\n\n- old age\n- [Alzheimer’s disease](https:\/\/www.healthline.com\/health\/alzheimers-disease-overview)\n- [brain tumors](https:\/\/www.healthline.com\/health\/brain-tumor)\n- [Huntington’s disease](https:\/\/www.healthline.com\/health\/huntingtons-disease)\n- hormonal problems\n- underactive thyroid\n- medications, including some antibiotics and high blood pressure medications\n- [multiple sclerosis](https:\/\/www.healthline.com\/health\/multiple-sclerosis)\n- [Parkinson’s disease](https:\/\/www.healthline.com\/health\/parkinsons)\n- [schizophrenia](https:\/\/www.healthline.com\/health\/schizophrenia)\n- [epilepsy](https:\/\/www.healthline.com\/health\/epilepsy)\n- [diabetes](https:\/\/www.healthline.com\/health\/diabetes)\n- exposure to chemicals that burn the inside of your nose\n- brain or head injury\n- brain surgery\n- [malnutrition](https:\/\/www.healthline.com\/health\/malnutrition) and vitamin deficiencies\n- radiation therapy\n- long-term [alcoholism](https:\/\/www.healthline.com\/health\/alcoholism\/basics)\n- [stroke](https:\/\/www.healthline.com\/health\/stroke)\n\nIn rare cases, people are born without a sense of smell due to a genetic condition. This is called congenital anosmia.\n\n## [How is anosmia diagnosed?]()\nThe loss of smell is difficult to measure. Your doctor may ask you some questions about your current symptoms, examine your nose, perform a complete physical examination, and ask about your health history.\n\nThey may ask questions about when the problem started, if all or only some types of odors are affected, and whether or not you can taste food. Depending on your answers, your doctor may also perform one or more of the following tests:\n\n- [CT scans](https:\/\/www.healthline.com\/health\/ct-scan), which use X-rays to create a detailed image of the brain\n- [MRI scans](https:\/\/www.healthline.com\/health\/ct-scan-vs-mri), which uses radio waves and magnets to view the brain\n- [X-ray](https:\/\/www.healthline.com\/health\/x-ray) of the skull\n- nasal endoscopy to look inside your nose\n\n## [What are the complications of anosmia?]()\nPeople with anosmia may lose interest in food and eating, leading to malnutrition and weight loss.\n\nPeople with anosmia should make sure to have functioning smoke alarms in their homes at all times. They should also be cautious with food storage and the use of natural gas because they may have trouble detecting spoiled foods and gas leaks.\n\nRecommended precautions include:\n\n- properly labeling foods with expiration dates\n- reading labels on chemicals like kitchen cleaners and insecticides\n- using electric appliances\n\n## [How is anosmia treated?]()\nTreatment depends on the cause. If the loss of smell occurs with a cold, allergy, or sinus infection, it typically will clear up on its own in a few days. You should consult your doctor if the anosmia doesn’t clear up once the cold or allergy symptoms have subsided.\n\nTreatments that may help resolve anosmia caused by nasal irritation include:\n\n- [decongestants](https:\/\/www.healthline.com\/health\/allergies\/decongestants#1)\n- [antihistamines](https:\/\/www.healthline.com\/health\/allergies\/antihistamine-brands)\n- [steroid nasal sprays](https:\/\/www.healthline.com\/health\/allergies\/corticosteroids)\n- antibiotics, for bacterial infections\n- reducing exposure to nasal irritants and allergens\n- [cessation of smoking](https:\/\/www.healthline.com\/health\/quit-smoking\/top-iphone-android-apps)\n\nLoss of smell caused by nasal obstruction can be treated by removing whatever is obstructing your nasal passage. This removal may involve a procedure to remove nasal polyps, straighten the nasal septum, or clear out the sinuses.\n\nOlder people are more susceptible to losing their sense of smell permanently.\n\nThere is no treatment currently available for people with congenital anosmia.\n\nPeople with a partial loss of their sense of smell can add concentrated flavoring agents to food to improve their enjoyment.\n\n### How we reviewed this article:\nSources\n\nHealthline has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical journals and associations. We only use quality, credible sources to ensure content accuracy and integrity. You can learn more about how we ensure our content is accurate and current by reading our [editorial policy](https:\/\/www.healthline.com\/about\/process).\n\n- Congenital anosmia. (n.d.).  \n  <https:\/\/rarediseases.info.nih.gov\/diseases\/9486\/congenital-anosmia>\n- Lostor changed sense of smell. (2017).  \n  <http:\/\/www.nhs.uk\/conditions\/anosmia\/Pages\/Introduction.aspx>\n- Mayo Clinic Staff. (2018). Loss of smell.  \n  <https:\/\/www.mayoclinic.org\/symptoms\/loss-of-smell\/basics\/definition\/sym-20050804>\n- Smell and taste disorders in primary care. (2013).  \n  <https:\/\/www.aafp.org\/afp\/2013\/1215\/p852.html>\n\nShare this article\n\n![](https:\/\/i0.wp.com\/post.healthline.com\/wp-content\/uploads\/2022\/01\/Alana-Biggers-500x500-Bio.png?w=105&h=105)\n\n[Medically reviewed]() by [Alana Biggers, M.D., MPH]() — Written by [Jacquelyn Cafasso]() —  [Updated on August 30, 2019]()\n\n## related stories\n- [This Is What It’s Like to Live Without Your Sense of Smell](https:\/\/www.healthline.com\/health\/living-without-your-sense-of-smell?utm_source=ReadNext)\n- [Impaired Smell](https:\/\/www.healthline.com\/health\/smell-impaired?utm_source=ReadNext)\n- [Impaired Taste](https:\/\/www.healthline.com\/health\/taste-impaired?utm_source=ReadNext)\n- [Hyperosmia](https:\/\/www.healthline.com\/health\/hyperosmia?utm_source=ReadNext)\n- [What Can Cause a Persistent Bad Smell in Your Nose?](https:\/\/www.healthline.com\/health\/video\/bad-smell-in-nose?utm_source=ReadNext)\n\n### Read this next\n- [This Is What It’s Like to Live Without Your Sense of Smell](https:\/\/www.healthline.com\/health\/living-without-your-sense-of-smell?utm_source=ReadNext)\n  \n  Medically reviewed by [Daniel Murrell, M.D.](https:\/\/www.healthline.com\/medical-team)\n  \n  [A well-functioning sense of smell is something most people take for granted, until it’s lost. Losing your sense of smell, known as anosmia, can make…](https:\/\/www.healthline.com\/health\/living-without-your-sense-of-smell?utm_source=ReadNext)\n  \n  [READ MORE](https:\/\/www.healthline.com\/health\/living-without-your-sense-of-smell?utm_source=ReadNext)\n- [Impaired Smell](https:\/\/www.healthline.com\/health\/smell-impaired?utm_source=ReadNext)\n  \n  Medically reviewed by [Alana Biggers, M.D., MPH](https:\/\/www.healthline.com\/medical-team)\n  \n  [Loss of smell can occur due to problems in the nose, brain, or nervous system. The impairment is usually a distorted sense of smell.](https:\/\/www.healthline.com\/health\/smell-impaired?utm_source=ReadNext)\n  \n  [READ MORE](https:\/\/www.healthline.com\/health\/smell-impaired?utm_source=ReadNext)\n- [Impaired Taste](https:\/\/www.healthline.com\/health\/taste-impaired?utm_source=ReadNext)\n  \n  Medically reviewed by [Angelica Balingit, MD](https:\/\/www.healthline.com\/medical-team)\n  \n  [Impaired taste is the absence or altered sense so taste, such as having a metallic taste in the mouth. Most people only experience impaired taste…](https:\/\/www.healthline.com\/health\/taste-impaired?utm_source=ReadNext)\n  \n  [READ MORE](https:\/\/www.healthline.com\/health\/taste-impaired?utm_source=ReadNext)\n- [Hyperosmia](https:\/\/www.healthline.com\/health\/hyperosmia?utm_source=ReadNext)\n  \n  Medically reviewed by [Alana Biggers, M.D., MPH](https:\/\/www.healthline.com\/medical-team)\n  \n  [Learn about hyperosmia, a heightened sense of smell, and its causes.](https:\/\/www.healthline.com\/health\/hyperosmia?utm_source=ReadNext)\n  \n  [READ MORE](https:\/\/www.healthline.com\/health\/hyperosmia?utm_source=ReadNext)\n- [What Can Cause a Persistent Bad Smell in Your Nose?](https:\/\/www.healthline.com\/health\/video\/bad-smell-in-nose?utm_source=ReadNext)\n  \n  Medically reviewed by [the Healthline Medical Network](https:\/\/www.healthline.com\/medical-team)\n  \n  [Some health conditions can cause a bad smell in your nose. Learn the causes and what to do about it.](https:\/\/www.healthline.com\/health\/video\/bad-smell-in-nose?utm_source=ReadNext)\n  \n  [READ MORE](https:\/\/www.healthline.com\/health\/video\/bad-smell-in-nose?utm_source=ReadNext)\n- [How to Make Your Nose Smaller](https:\/\/www.healthline.com\/health\/how-to-make-your-nose-smaller?utm_source=ReadNext)\n  \n  Medically reviewed by [Cynthia Cobb, DNP, APRN, WHNP-BC, FAANP](https:\/\/www.healthline.com\/medical-team)\n  \n  [Cleopatra had a nose that was so long and large that people are still talking about it. But some people see having a prominent nose as a bad thing. If…](https:\/\/www.healthline.com\/health\/how-to-make-your-nose-smaller?utm_source=ReadNext)\n  \n  [READ MORE](https:\/\/www.healthline.com\/health\/how-to-make-your-nose-smaller?utm_source=ReadNext)\n- [What Can Cause a Crackling Sound in Your Nose and How to Treat It](https:\/\/www.healthline.com\/health\/how-to-stop-crackling-noise-in-nose?utm_source=ReadNext)\n  \n  Medically reviewed by [Nicole Leigh Aaronson, MD, MBA, CPE, FACS, FAAP](https:\/\/www.healthline.com\/medical-team)\n  \n  [Crackling sounds in your nose may be attributed to a number of conditions involving your sinuses. Here's what you need to know.](https:\/\/www.healthline.com\/health\/how-to-stop-crackling-noise-in-nose?utm_source=ReadNext)\n  \n  [READ MORE](https:\/\/www.healthline.com\/health\/how-to-stop-crackling-noise-in-nose?utm_source=ReadNext)\n- [Is It Bad to Eat Your Boogers?](https:\/\/www.healthline.com\/health\/eating-boogers?utm_source=ReadNext)\n  \n  Medically reviewed by [Karen Gill, M.D.](https:\/\/www.healthline.com\/medical-team)\n  \n  [Nose picking and eating the boogers inside, also known as mucophagy, has traditionally been met with looks of disgust. However, some may suggest…](https:\/\/www.healthline.com\/health\/eating-boogers?utm_source=ReadNext)\n  \n  [READ MORE](https:\/\/www.healthline.com\/health\/eating-boogers?utm_source=ReadNext)\n- [Deviated Septum](https:\/\/www.healthline.com\/health\/deviated-septum?utm_source=ReadNext)\n  \n  Medically reviewed by [Alana Biggers, M.D., MPH](https:\/\/www.healthline.com\/medical-team)\n  \n  [A deviated septum may cause health complications such as difficulty breathing. Learn more about the causes, symptoms, treatments, and more.](https:\/\/www.healthline.com\/health\/deviated-septum?utm_source=ReadNext)\n  \n  [READ MORE](https:\/\/www.healthline.com\/health\/deviated-septum?utm_source=ReadNext)\n- [What is This Red Spot on My Nose?](https:\/\/www.healthline.com\/health\/red-spot-on-nose?utm_source=ReadNext)\n  \n  Medically reviewed by [Alana Biggers, M.D., MPH](https:\/\/www.healthline.com\/medical-team)\n  \n  [Do you have a red spot on your nose? It could be due to a disease, skin condition, or dry skin. Chances are the spot is not harmful and will likely go…](https:\/\/www.healthline.com\/health\/red-spot-on-nose?utm_source=ReadNext)\n  \n  [READ MORE](https:\/\/www.healthline.com\/health\/red-spot-on-nose?utm_source=ReadNext)\n\n© 2026 Healthline Media LLC. All rights reserved. Healthline Media is an RVO Health Company. Our website services, content, and products are for informational purposes only. Healthline Media does not provide medical advice, diagnosis, or treatment. [See additional information](https:\/\/www.healthline.com\/additional-information).\n\n- [About Us](https:\/\/www.healthline.com\/about)\n- [Contact Us](https:\/\/www.healthline.com\/about\/contact-us)\n- [Privacy Policy](https:\/\/www.healthline.com\/privacy-policy)\n- Privacy Settings\n- [Advertising Policy](https:\/\/www.healthline.com\/advertising-policy)\n- [Health Topics](https:\/\/www.healthline.com\/directory\/topics)\n\n- [Sitemap](https:\/\/www.healthline.com\/sitemap)\n- [Medical Affairs](https:\/\/www.healthline.com\/medical-team)\n- [Content Integrity](https:\/\/www.healthline.com\/about\/content-integrity)\n- [Newsletters](https:\/\/www.healthline.com\/newsletter-signup)\n- © 2026 Healthline Media LLC. All rights reserved. Healthline Media is an RVO Health Company. Our website services, content, and products are for informational purposes only. Healthline Media does not provide medical advice, diagnosis, or treatment. [See additional information](https:\/\/www.healthline.com\/additional-information).\n\n© 2026 Healthline Media LLC. All rights reserved. Healthline Media is an RVO Health Company. Our website services, content, and products are for informational purposes only. Healthline Media does not provide medical advice, diagnosis, or treatment. [See additional information](https:\/\/www.healthline.com\/additional-information).\n\n[About](https:\/\/www.healthlinemedia.com\/?utm_source=healthline.com&utm_medium=site&utm_campaign=footer&utm_content=about)[Careers](https:\/\/rvohealth.com\/careers)[Advertise with us](https:\/\/www.healthlinemedia.com\/advertise?utm_source=healthline.com&utm_medium=site&utm_campaign=footer&utm_content=advertise)\n\nOUR BRANDS\n\n[Healthline](https:\/\/www.healthline.com\/)[Medical News Today](https:\/\/www.medicalnewstoday.com\/)[Greatist](https:\/\/greatist.com\/)[Psych Central](https:\/\/psychcentral.com\/)[Bezzy](https:\/\/bezzy.com\/)\n\n![](http:\/\/b.scorecardresearch.com\/p?c1=2&c2=38584006&cv=3.9&cj=1&comscorekw=main)","attrs_readable_markdown":"Overview\n\nAnosmia is the partial or complete loss of the sense of smell. This loss may be temporary or permanent. Common conditions that irritate the nose’s lining, such as allergies or a cold, can lead to temporary anosmia.\n\nMore serious conditions that affect the brain or nerves, such as brain tumors or head trauma, can cause permanent loss of smell. Old age sometimes causes anosmia.\n\nAnosmia usually isn’t serious, but it can have a profound effect on a person’s quality of life.\n\nPeople with anosmia may not be able to fully taste foods and may lose interest in eating. This can lead to weight loss or malnutrition. Anosmia can also lead to depression because it may impair one’s ability to smell or taste pleasurable foods.\n\nAnosmia is frequently caused by a swelling or blockage in the nose that prevents odors from getting to the top of the nose. Anosmia is sometimes caused by a problem with the system that sends signals from the nose to the brain.\n\nBelow are the main causes of anosmia:\n\nIrritation to the mucus membranes lining the nose\n\nThis can result from:\n\n- sinus infections\n- [common colds](https:\/\/www.healthline.com\/health\/cold-flu\/head-cold)\n- smoking\n- the [flu](https:\/\/www.healthline.com\/health\/flu-causes), or influenza\n- allergies ([allergic rhinitis](https:\/\/www.healthline.com\/health\/allergic-rhinitis))\n- chronic congestion not related to allergies (nonallergic rhinitis)\n\nA cold is the most common cause of partial and temporary loss of smell. In these cases, the anosmia will go away on its own.\n\nBlockage of the nasal passages\n\nLoss of smell can occur if something is physically blocking the passage of air into the nose. This may include:\n\n- tumors\n- [nasal polyps](https:\/\/www.healthline.com\/health\/nasal-polyps)\n- bone deformities inside the nose or a nasal septum\n\nBrain or nerve damage\n\nThere are receptors inside the nose that send information through nerves to the brain. Anosmia can occur if any part of this pathway is damaged. There are many conditions that can cause this damage, including:\n\n- old age\n- [Alzheimer’s disease](https:\/\/www.healthline.com\/health\/alzheimers-disease-overview)\n- [brain tumors](https:\/\/www.healthline.com\/health\/brain-tumor)\n- [Huntington’s disease](https:\/\/www.healthline.com\/health\/huntingtons-disease)\n- hormonal problems\n- underactive thyroid\n- medications, including some antibiotics and high blood pressure medications\n- [multiple sclerosis](https:\/\/www.healthline.com\/health\/multiple-sclerosis)\n- [Parkinson’s disease](https:\/\/www.healthline.com\/health\/parkinsons)\n- [schizophrenia](https:\/\/www.healthline.com\/health\/schizophrenia)\n- [epilepsy](https:\/\/www.healthline.com\/health\/epilepsy)\n- [diabetes](https:\/\/www.healthline.com\/health\/diabetes)\n- exposure to chemicals that burn the inside of your nose\n- brain or head injury\n- brain surgery\n- [malnutrition](https:\/\/www.healthline.com\/health\/malnutrition) and vitamin deficiencies\n- radiation therapy\n- long-term [alcoholism](https:\/\/www.healthline.com\/health\/alcoholism\/basics)\n- [stroke](https:\/\/www.healthline.com\/health\/stroke)\n\nIn rare cases, people are born without a sense of smell due to a genetic condition. This is called congenital anosmia.\n\nThe loss of smell is difficult to measure. Your doctor may ask you some questions about your current symptoms, examine your nose, perform a complete physical examination, and ask about your health history.\n\nThey may ask questions about when the problem started, if all or only some types of odors are affected, and whether or not you can taste food. Depending on your answers, your doctor may also perform one or more of the following tests:\n\n- [CT scans](https:\/\/www.healthline.com\/health\/ct-scan), which use X-rays to create a detailed image of the brain\n- [MRI scans](https:\/\/www.healthline.com\/health\/ct-scan-vs-mri), which uses radio waves and magnets to view the brain\n- [X-ray](https:\/\/www.healthline.com\/health\/x-ray) of the skull\n- nasal endoscopy to look inside your nose\n\nPeople with anosmia may lose interest in food and eating, leading to malnutrition and weight loss.\n\nPeople with anosmia should make sure to have functioning smoke alarms in their homes at all times. They should also be cautious with food storage and the use of natural gas because they may have trouble detecting spoiled foods and gas leaks.\n\nRecommended precautions include:\n\n- properly labeling foods with expiration dates\n- reading labels on chemicals like kitchen cleaners and insecticides\n- using electric appliances\n\nTreatment depends on the cause. If the loss of smell occurs with a cold, allergy, or sinus infection, it typically will clear up on its own in a few days. You should consult your doctor if the anosmia doesn’t clear up once the cold or allergy symptoms have subsided.\n\nTreatments that may help resolve anosmia caused by nasal irritation include:\n\n- [decongestants](https:\/\/www.healthline.com\/health\/allergies\/decongestants#1)\n- [antihistamines](https:\/\/www.healthline.com\/health\/allergies\/antihistamine-brands)\n- [steroid nasal sprays](https:\/\/www.healthline.com\/health\/allergies\/corticosteroids)\n- antibiotics, for bacterial infections\n- reducing exposure to nasal irritants and allergens\n- [cessation of smoking](https:\/\/www.healthline.com\/health\/quit-smoking\/top-iphone-android-apps)\n\nLoss of smell caused by nasal obstruction can be treated by removing whatever is obstructing your nasal passage. This removal may involve a procedure to remove nasal polyps, straighten the nasal septum, or clear out the sinuses.\n\nOlder people are more susceptible to losing their sense of smell permanently.\n\nThere is no treatment currently available for people with congenital anosmia.\n\nPeople with a partial loss of their sense of smell can add concentrated flavoring agents to food to improve their enjoyment.","meta_canonical":null}

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Meta Title	Anosmia: Causes, Complications, and Treatment
Meta Description	Anosmia is an absent or decreased sense of smell. Read more on what causes it and how to treat it.
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Boilerpipe Text	Overview Anosmia is the partial or complete loss of the sense of smell. This loss may be temporary or permanent. Common conditions that irritate the nose’s lining, such as allergies or a cold, can lead to temporary anosmia. More serious conditions that affect the brain or nerves, such as brain tumors or head trauma, can cause permanent loss of smell. Old age sometimes causes anosmia. Anosmia usually isn’t serious, but it can have a profound effect on a person’s quality of life. People with anosmia may not be able to fully taste foods and may lose interest in eating. This can lead to weight loss or malnutrition. Anosmia can also lead to depression because it may impair one’s ability to smell or taste pleasurable foods. Anosmia is frequently caused by a swelling or blockage in the nose that prevents odors from getting to the top of the nose. Anosmia is sometimes caused by a problem with the system that sends signals from the nose to the brain. Below are the main causes of anosmia: Irritation to the mucus membranes lining the nose This can result from: sinus infections common colds smoking the flu , or influenza allergies ( allergic rhinitis ) chronic congestion not related to allergies (nonallergic rhinitis) A cold is the most common cause of partial and temporary loss of smell. In these cases, the anosmia will go away on its own. Blockage of the nasal passages Loss of smell can occur if something is physically blocking the passage of air into the nose. This may include: tumors nasal polyps bone deformities inside the nose or a nasal septum Brain or nerve damage There are receptors inside the nose that send information through nerves to the brain. Anosmia can occur if any part of this pathway is damaged. There are many conditions that can cause this damage, including: old age Alzheimer’s disease brain tumors Huntington’s disease hormonal problems underactive thyroid medications, including some antibiotics and high blood pressure medications multiple sclerosis Parkinson’s disease schizophrenia epilepsy diabetes exposure to chemicals that burn the inside of your nose brain or head injury brain surgery malnutrition and vitamin deficiencies radiation therapy long-term alcoholism stroke In rare cases, people are born without a sense of smell due to a genetic condition. This is called congenital anosmia. The loss of smell is difficult to measure. Your doctor may ask you some questions about your current symptoms, examine your nose, perform a complete physical examination, and ask about your health history. They may ask questions about when the problem started, if all or only some types of odors are affected, and whether or not you can taste food. Depending on your answers, your doctor may also perform one or more of the following tests: CT scans , which use X-rays to create a detailed image of the brain MRI scans , which uses radio waves and magnets to view the brain X-ray of the skull nasal endoscopy to look inside your nose People with anosmia may lose interest in food and eating, leading to malnutrition and weight loss. People with anosmia should make sure to have functioning smoke alarms in their homes at all times. They should also be cautious with food storage and the use of natural gas because they may have trouble detecting spoiled foods and gas leaks. Recommended precautions include: properly labeling foods with expiration dates reading labels on chemicals like kitchen cleaners and insecticides using electric appliances Treatment depends on the cause. If the loss of smell occurs with a cold, allergy, or sinus infection, it typically will clear up on its own in a few days. You should consult your doctor if the anosmia doesn’t clear up once the cold or allergy symptoms have subsided. Treatments that may help resolve anosmia caused by nasal irritation include: decongestants antihistamines steroid nasal sprays antibiotics, for bacterial infections reducing exposure to nasal irritants and allergens cessation of smoking Loss of smell caused by nasal obstruction can be treated by removing whatever is obstructing your nasal passage. This removal may involve a procedure to remove nasal polyps, straighten the nasal septum, or clear out the sinuses. Older people are more susceptible to losing their sense of smell permanently. There is no treatment currently available for people with congenital anosmia. People with a partial loss of their sense of smell can add concentrated flavoring agents to food to improve their enjoyment.
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Connect with us for all things health. Subscribe [Weight Management](https://www.healthline.com/weight-management) - [Nutrition](https://www.healthline.com/weight-management/nutrition) - [Fitness](https://www.healthline.com/weight-management/fitness) - [Mental Well-Being](https://www.healthline.com/weight-management/well-being) - [Sleep](https://www.healthline.com/weight-management/sleep) - [Healthy Habits](https://www.healthline.com/weight-management/healthy-habits) - Treatment - [Treatment & Medications](https://www.healthline.com/weight-management/treatment-medication) - [GLP-1s](https://www.healthline.com/weight-management/treatment-medication/glp-1s) - [Alternatives to GLP-1s](https://www.healthline.com/weight-management/treatment-medication/alternatives-to-glp-1s) - [Surgery & Procedures](https://www.healthline.com/weight-management/treatment-medication/surgery-procedures) - [Apps](https://www.healthline.com/weight-management/apps-products) # What Is Anosmia? ![](https://i0.wp.com/post.healthline.com/wp-content/uploads/2022/01/Alana-Biggers-500x500-Bio.png?w=105&h=105) [Medically reviewed]() by [Alana Biggers, M.D., MPH]() — Written by [Jacquelyn Cafasso]() — [Updated on August 30, 2019]() - [Causes](https://www.healthline.com/health/anosmia#causes) - [Diagnosis](https://www.healthline.com/health/anosmia#diagnosis) - [Complications](https://www.healthline.com/health/anosmia#complications) - [Treatment](https://www.healthline.com/health/anosmia#treatment) Overview Anosmia is the partial or complete loss of the sense of smell. This loss may be temporary or permanent. Common conditions that irritate the nose’s lining, such as allergies or a cold, can lead to temporary anosmia. More serious conditions that affect the brain or nerves, such as brain tumors or head trauma, can cause permanent loss of smell. Old age sometimes causes anosmia. Anosmia usually isn’t serious, but it can have a profound effect on a person’s quality of life. People with anosmia may not be able to fully taste foods and may lose interest in eating. This can lead to weight loss or malnutrition. Anosmia can also lead to depression because it may impair one’s ability to smell or taste pleasurable foods. ## [What causes anosmia?]() Anosmia is frequently caused by a swelling or blockage in the nose that prevents odors from getting to the top of the nose. Anosmia is sometimes caused by a problem with the system that sends signals from the nose to the brain. Below are the main causes of anosmia: ### Irritation to the mucus membranes lining the nose This can result from: - sinus infections - [common colds](https://www.healthline.com/health/cold-flu/head-cold) - smoking - the [flu](https://www.healthline.com/health/flu-causes), or influenza - allergies ([allergic rhinitis](https://www.healthline.com/health/allergic-rhinitis)) - chronic congestion not related to allergies (nonallergic rhinitis) A cold is the most common cause of partial and temporary loss of smell. In these cases, the anosmia will go away on its own. ### Blockage of the nasal passages Loss of smell can occur if something is physically blocking the passage of air into the nose. This may include: - tumors - [nasal polyps](https://www.healthline.com/health/nasal-polyps) - bone deformities inside the nose or a nasal septum ### Brain or nerve damage There are receptors inside the nose that send information through nerves to the brain. Anosmia can occur if any part of this pathway is damaged. There are many conditions that can cause this damage, including: - old age - [Alzheimer’s disease](https://www.healthline.com/health/alzheimers-disease-overview) - [brain tumors](https://www.healthline.com/health/brain-tumor) - [Huntington’s disease](https://www.healthline.com/health/huntingtons-disease) - hormonal problems - underactive thyroid - medications, including some antibiotics and high blood pressure medications - [multiple sclerosis](https://www.healthline.com/health/multiple-sclerosis) - [Parkinson’s disease](https://www.healthline.com/health/parkinsons) - [schizophrenia](https://www.healthline.com/health/schizophrenia) - [epilepsy](https://www.healthline.com/health/epilepsy) - [diabetes](https://www.healthline.com/health/diabetes) - exposure to chemicals that burn the inside of your nose - brain or head injury - brain surgery - [malnutrition](https://www.healthline.com/health/malnutrition) and vitamin deficiencies - radiation therapy - long-term [alcoholism](https://www.healthline.com/health/alcoholism/basics) - [stroke](https://www.healthline.com/health/stroke) In rare cases, people are born without a sense of smell due to a genetic condition. This is called congenital anosmia. ## [How is anosmia diagnosed?]() The loss of smell is difficult to measure. Your doctor may ask you some questions about your current symptoms, examine your nose, perform a complete physical examination, and ask about your health history. They may ask questions about when the problem started, if all or only some types of odors are affected, and whether or not you can taste food. Depending on your answers, your doctor may also perform one or more of the following tests: - [CT scans](https://www.healthline.com/health/ct-scan), which use X-rays to create a detailed image of the brain - [MRI scans](https://www.healthline.com/health/ct-scan-vs-mri), which uses radio waves and magnets to view the brain - [X-ray](https://www.healthline.com/health/x-ray) of the skull - nasal endoscopy to look inside your nose ## [What are the complications of anosmia?]() People with anosmia may lose interest in food and eating, leading to malnutrition and weight loss. People with anosmia should make sure to have functioning smoke alarms in their homes at all times. They should also be cautious with food storage and the use of natural gas because they may have trouble detecting spoiled foods and gas leaks. Recommended precautions include: - properly labeling foods with expiration dates - reading labels on chemicals like kitchen cleaners and insecticides - using electric appliances ## [How is anosmia treated?]() Treatment depends on the cause. If the loss of smell occurs with a cold, allergy, or sinus infection, it typically will clear up on its own in a few days. You should consult your doctor if the anosmia doesn’t clear up once the cold or allergy symptoms have subsided. Treatments that may help resolve anosmia caused by nasal irritation include: - [decongestants](https://www.healthline.com/health/allergies/decongestants#1) - [antihistamines](https://www.healthline.com/health/allergies/antihistamine-brands) - [steroid nasal sprays](https://www.healthline.com/health/allergies/corticosteroids) - antibiotics, for bacterial infections - reducing exposure to nasal irritants and allergens - [cessation of smoking](https://www.healthline.com/health/quit-smoking/top-iphone-android-apps) Loss of smell caused by nasal obstruction can be treated by removing whatever is obstructing your nasal passage. This removal may involve a procedure to remove nasal polyps, straighten the nasal septum, or clear out the sinuses. Older people are more susceptible to losing their sense of smell permanently. There is no treatment currently available for people with congenital anosmia. People with a partial loss of their sense of smell can add concentrated flavoring agents to food to improve their enjoyment. ### How we reviewed this article: Sources Healthline has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical journals and associations. We only use quality, credible sources to ensure content accuracy and integrity. You can learn more about how we ensure our content is accurate and current by reading our [editorial policy](https://www.healthline.com/about/process). - Congenital anosmia. (n.d.). <https://rarediseases.info.nih.gov/diseases/9486/congenital-anosmia> - Lostor changed sense of smell. (2017). <http://www.nhs.uk/conditions/anosmia/Pages/Introduction.aspx> - Mayo Clinic Staff. (2018). Loss of smell. <https://www.mayoclinic.org/symptoms/loss-of-smell/basics/definition/sym-20050804> - Smell and taste disorders in primary care. (2013). <https://www.aafp.org/afp/2013/1215/p852.html> Share this article ![](https://i0.wp.com/post.healthline.com/wp-content/uploads/2022/01/Alana-Biggers-500x500-Bio.png?w=105&h=105) [Medically reviewed]() by [Alana Biggers, M.D., MPH]() — Written by [Jacquelyn Cafasso]() — [Updated on August 30, 2019]() ## related stories - [This Is What It’s Like to Live Without Your Sense of Smell](https://www.healthline.com/health/living-without-your-sense-of-smell?utm_source=ReadNext) - [Impaired Smell](https://www.healthline.com/health/smell-impaired?utm_source=ReadNext) - [Impaired Taste](https://www.healthline.com/health/taste-impaired?utm_source=ReadNext) - [Hyperosmia](https://www.healthline.com/health/hyperosmia?utm_source=ReadNext) - [What Can Cause a Persistent Bad Smell in Your Nose?](https://www.healthline.com/health/video/bad-smell-in-nose?utm_source=ReadNext) ### Read this next - [This Is What It’s Like to Live Without Your Sense of Smell](https://www.healthline.com/health/living-without-your-sense-of-smell?utm_source=ReadNext) Medically reviewed by [Daniel Murrell, M.D.](https://www.healthline.com/medical-team) [A well-functioning sense of smell is something most people take for granted, until it’s lost. Losing your sense of smell, known as anosmia, can make…](https://www.healthline.com/health/living-without-your-sense-of-smell?utm_source=ReadNext) [READ MORE](https://www.healthline.com/health/living-without-your-sense-of-smell?utm_source=ReadNext) - [Impaired Smell](https://www.healthline.com/health/smell-impaired?utm_source=ReadNext) Medically reviewed by [Alana Biggers, M.D., MPH](https://www.healthline.com/medical-team) [Loss of smell can occur due to problems in the nose, brain, or nervous system. The impairment is usually a distorted sense of smell.](https://www.healthline.com/health/smell-impaired?utm_source=ReadNext) [READ MORE](https://www.healthline.com/health/smell-impaired?utm_source=ReadNext) - [Impaired Taste](https://www.healthline.com/health/taste-impaired?utm_source=ReadNext) Medically reviewed by [Angelica Balingit, MD](https://www.healthline.com/medical-team) [Impaired taste is the absence or altered sense so taste, such as having a metallic taste in the mouth. Most people only experience impaired taste…](https://www.healthline.com/health/taste-impaired?utm_source=ReadNext) [READ MORE](https://www.healthline.com/health/taste-impaired?utm_source=ReadNext) - [Hyperosmia](https://www.healthline.com/health/hyperosmia?utm_source=ReadNext) Medically reviewed by [Alana Biggers, M.D., MPH](https://www.healthline.com/medical-team) [Learn about hyperosmia, a heightened sense of smell, and its causes.](https://www.healthline.com/health/hyperosmia?utm_source=ReadNext) [READ MORE](https://www.healthline.com/health/hyperosmia?utm_source=ReadNext) - [What Can Cause a Persistent Bad Smell in Your Nose?](https://www.healthline.com/health/video/bad-smell-in-nose?utm_source=ReadNext) Medically reviewed by [the Healthline Medical Network](https://www.healthline.com/medical-team) [Some health conditions can cause a bad smell in your nose. Learn the causes and what to do about it.](https://www.healthline.com/health/video/bad-smell-in-nose?utm_source=ReadNext) [READ MORE](https://www.healthline.com/health/video/bad-smell-in-nose?utm_source=ReadNext) - [How to Make Your Nose Smaller](https://www.healthline.com/health/how-to-make-your-nose-smaller?utm_source=ReadNext) Medically reviewed by [Cynthia Cobb, DNP, APRN, WHNP-BC, FAANP](https://www.healthline.com/medical-team) [Cleopatra had a nose that was so long and large that people are still talking about it. But some people see having a prominent nose as a bad thing. If…](https://www.healthline.com/health/how-to-make-your-nose-smaller?utm_source=ReadNext) [READ MORE](https://www.healthline.com/health/how-to-make-your-nose-smaller?utm_source=ReadNext) - [What Can Cause a Crackling Sound in Your Nose and How to Treat It](https://www.healthline.com/health/how-to-stop-crackling-noise-in-nose?utm_source=ReadNext) Medically reviewed by [Nicole Leigh Aaronson, MD, MBA, CPE, FACS, FAAP](https://www.healthline.com/medical-team) [Crackling sounds in your nose may be attributed to a number of conditions involving your sinuses. Here's what you need to know.](https://www.healthline.com/health/how-to-stop-crackling-noise-in-nose?utm_source=ReadNext) [READ MORE](https://www.healthline.com/health/how-to-stop-crackling-noise-in-nose?utm_source=ReadNext) - [Is It Bad to Eat Your Boogers?](https://www.healthline.com/health/eating-boogers?utm_source=ReadNext) Medically reviewed by [Karen Gill, M.D.](https://www.healthline.com/medical-team) [Nose picking and eating the boogers inside, also known as mucophagy, has traditionally been met with looks of disgust. However, some may suggest…](https://www.healthline.com/health/eating-boogers?utm_source=ReadNext) [READ MORE](https://www.healthline.com/health/eating-boogers?utm_source=ReadNext) - [Deviated Septum](https://www.healthline.com/health/deviated-septum?utm_source=ReadNext) Medically reviewed by [Alana Biggers, M.D., MPH](https://www.healthline.com/medical-team) [A deviated septum may cause health complications such as difficulty breathing. Learn more about the causes, symptoms, treatments, and more.](https://www.healthline.com/health/deviated-septum?utm_source=ReadNext) [READ MORE](https://www.healthline.com/health/deviated-septum?utm_source=ReadNext) - [What is This Red Spot on My Nose?](https://www.healthline.com/health/red-spot-on-nose?utm_source=ReadNext) Medically reviewed by [Alana Biggers, M.D., MPH](https://www.healthline.com/medical-team) [Do you have a red spot on your nose? It could be due to a disease, skin condition, or dry skin. Chances are the spot is not harmful and will likely go…](https://www.healthline.com/health/red-spot-on-nose?utm_source=ReadNext) [READ MORE](https://www.healthline.com/health/red-spot-on-nose?utm_source=ReadNext) © 2026 Healthline Media LLC. All rights reserved. Healthline Media is an RVO Health Company. Our website services, content, and products are for informational purposes only. Healthline Media does not provide medical advice, diagnosis, or treatment. 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Readable Markdown	Overview Anosmia is the partial or complete loss of the sense of smell. This loss may be temporary or permanent. Common conditions that irritate the nose’s lining, such as allergies or a cold, can lead to temporary anosmia. More serious conditions that affect the brain or nerves, such as brain tumors or head trauma, can cause permanent loss of smell. Old age sometimes causes anosmia. Anosmia usually isn’t serious, but it can have a profound effect on a person’s quality of life. People with anosmia may not be able to fully taste foods and may lose interest in eating. This can lead to weight loss or malnutrition. Anosmia can also lead to depression because it may impair one’s ability to smell or taste pleasurable foods. Anosmia is frequently caused by a swelling or blockage in the nose that prevents odors from getting to the top of the nose. Anosmia is sometimes caused by a problem with the system that sends signals from the nose to the brain. Below are the main causes of anosmia: Irritation to the mucus membranes lining the nose This can result from: - sinus infections - [common colds](https://www.healthline.com/health/cold-flu/head-cold) - smoking - the [flu](https://www.healthline.com/health/flu-causes), or influenza - allergies ([allergic rhinitis](https://www.healthline.com/health/allergic-rhinitis)) - chronic congestion not related to allergies (nonallergic rhinitis) A cold is the most common cause of partial and temporary loss of smell. In these cases, the anosmia will go away on its own. Blockage of the nasal passages Loss of smell can occur if something is physically blocking the passage of air into the nose. This may include: - tumors - [nasal polyps](https://www.healthline.com/health/nasal-polyps) - bone deformities inside the nose or a nasal septum Brain or nerve damage There are receptors inside the nose that send information through nerves to the brain. Anosmia can occur if any part of this pathway is damaged. There are many conditions that can cause this damage, including: - old age - [Alzheimer’s disease](https://www.healthline.com/health/alzheimers-disease-overview) - [brain tumors](https://www.healthline.com/health/brain-tumor) - [Huntington’s disease](https://www.healthline.com/health/huntingtons-disease) - hormonal problems - underactive thyroid - medications, including some antibiotics and high blood pressure medications - [multiple sclerosis](https://www.healthline.com/health/multiple-sclerosis) - [Parkinson’s disease](https://www.healthline.com/health/parkinsons) - [schizophrenia](https://www.healthline.com/health/schizophrenia) - [epilepsy](https://www.healthline.com/health/epilepsy) - [diabetes](https://www.healthline.com/health/diabetes) - exposure to chemicals that burn the inside of your nose - brain or head injury - brain surgery - [malnutrition](https://www.healthline.com/health/malnutrition) and vitamin deficiencies - radiation therapy - long-term [alcoholism](https://www.healthline.com/health/alcoholism/basics) - [stroke](https://www.healthline.com/health/stroke) In rare cases, people are born without a sense of smell due to a genetic condition. This is called congenital anosmia. The loss of smell is difficult to measure. Your doctor may ask you some questions about your current symptoms, examine your nose, perform a complete physical examination, and ask about your health history. They may ask questions about when the problem started, if all or only some types of odors are affected, and whether or not you can taste food. Depending on your answers, your doctor may also perform one or more of the following tests: - [CT scans](https://www.healthline.com/health/ct-scan), which use X-rays to create a detailed image of the brain - [MRI scans](https://www.healthline.com/health/ct-scan-vs-mri), which uses radio waves and magnets to view the brain - [X-ray](https://www.healthline.com/health/x-ray) of the skull - nasal endoscopy to look inside your nose People with anosmia may lose interest in food and eating, leading to malnutrition and weight loss. People with anosmia should make sure to have functioning smoke alarms in their homes at all times. They should also be cautious with food storage and the use of natural gas because they may have trouble detecting spoiled foods and gas leaks. Recommended precautions include: - properly labeling foods with expiration dates - reading labels on chemicals like kitchen cleaners and insecticides - using electric appliances Treatment depends on the cause. If the loss of smell occurs with a cold, allergy, or sinus infection, it typically will clear up on its own in a few days. You should consult your doctor if the anosmia doesn’t clear up once the cold or allergy symptoms have subsided. Treatments that may help resolve anosmia caused by nasal irritation include: - [decongestants](https://www.healthline.com/health/allergies/decongestants#1) - [antihistamines](https://www.healthline.com/health/allergies/antihistamine-brands) - [steroid nasal sprays](https://www.healthline.com/health/allergies/corticosteroids) - antibiotics, for bacterial infections - reducing exposure to nasal irritants and allergens - [cessation of smoking](https://www.healthline.com/health/quit-smoking/top-iphone-android-apps) Loss of smell caused by nasal obstruction can be treated by removing whatever is obstructing your nasal passage. This removal may involve a procedure to remove nasal polyps, straighten the nasal septum, or clear out the sinuses. Older people are more susceptible to losing their sense of smell permanently. There is no treatment currently available for people with congenital anosmia. People with a partial loss of their sense of smell can add concentrated flavoring agents to food to improve their enjoyment.
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