🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 98 (from laksa077)

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/fever\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.healthline.com/health/fever\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.healthline.com\/health\/fever","crawl_time":1775046005,"first_indexed_time":1506271981,"http_code":200,"src_unparsed":"com,healthline!www,\/health\/fever s443","src_root_hash":"11478817528691466898","history_drop_reason":null,"meta_title":"Fever: Causes, Treatment, and Prevention","meta_descriptions":["Find information on the causes, treatment, and prevention of fever. Learn when you should see a doctor about a fever."],"attrs_boilerpipe_text":"Overview\nFever is also known as hyperthermia, pyrexia, or elevated temperature. It describes a body temperature that’s higher than normal. Fever can affect children and adults.\nA short-term increase in body temperature can help your body fight off illness. However, a severe fever can be a symptom of a serious condition that requires immediate medical attention.\nRecognizing a fever can enable you to get treatment and proper monitoring for it. Normal body temperature is typically around 98.6°F (37°C). However, the normal body temperature for each person can vary slightly.\nNormal body temperature may also fluctuate depending on the time of day. It tends to be lower in the morning and higher in the late afternoon and evening.\nOther factors, such as your\nmenstrual cycle\nor intense exercise, can also affect body temperature.\nTo check you or your child’s temperature, you can use an oral, rectal, or axillary thermometer.\nAn oral thermometer should be placed under the tongue for three minutes.\nYou may also use an oral thermometer for an axillary, or armpit, reading. Simply place the thermometer in the armpit and cross your arms or your child’s arms over the chest. Wait four to five minutes before removing the thermometer.\nA rectal thermometer may be used for measuring body temperature in infants. To do this:\nPlace a small amount of petroleum jelly on the bulb.\nLay your baby on their stomach and gently insert the thermometer about 1 inch into their rectum.\nHold the bulb and your baby still for at least three minutes.\nIn general, a baby has a fever when their body temperature exceeds 100.4°F (38°C). A child has a fever when their temperature exceeds 99.5°F (37.5°C). An adult has a fever when their temperature exceeds 99–99.5°F (37.2–37.5°C).\nCare for a fever depends on its severity. A low-grade fever with no other symptoms doesn’t typically require medical treatment. Drinking fluids and resting in bed are usually enough to fight off a fever.\nWhen a fever is accompanied by mild symptoms, such as general discomfort or dehydration, it can be helpful to treat elevated body temperature by:\nmaking sure the room temperature where the person is resting is comfortable\ntaking a regular bath or a sponge bath using lukewarm water\ntaking\nacetaminophen (Tylenol) or ibuprofen (Advil)\ndrinking plenty of fluids\nA mild fever can typically be treated at home. In some cases, however, a fever can be a symptom of a serious medical condition that requires prompt treatment.\nYou should take your infant to a doctor if they’re:\nyounger than 3 months old and have a temperature exceeding 100.4°F (38°C)\nbetween 3 and 6 months old, have a temperature over 102°F (38.9°C), and seem unusually irritable,\nlethargic\n, or uncomfortable\nbetween 6 and 24 months old and have a temperature higher than 102°F (38.9°C) that lasts longer than one day\nYou should take your child to see a doctor if they:\nhave a body temperature exceeding 102.2°F (39°C)\nhave had a fever for more than three days\nmake poor eye contact with you\nseem restless or irritable\nhave recently had one or more immunizations\nhave a serious medical illness or a compromised immune system\nhave recently been in a developing country\nYou should call your doctor if you:\nhave a body temperature exceeding 103°F (39.4°C)\nhave had a fever for more than three days\nhave a serious medical illness or a compromised immune system\nhave recently been in a developing country\nYou or your child should also see a doctor as soon as possible if a fever is accompanied by any of the following symptoms:\na severe headache\nthroat swelling\na\nskin rash\n, especially if the rash gets worse\nsensitivity to bright light\na stiff neck and\nneck pain\npersistent\nvomiting\nlistlessness or irritability\nabdominal pain\npain when urinating\nmuscle weakness\ntrouble breathing or chest pain\nconfusion\nYour doctor will probably perform a physical examination and medical tests. This will help them determine the cause of the fever and an effective course of treatment.\nLimiting exposure to infectious agents is one of the best ways to prevent a fever. Infectious agents often cause body temperature to rise. Here are some tips that can help reduce your exposure:\nWash your hands often, especially before eating, after using the toilet, and after being around large numbers of people.\nShow your children how to\nwash their hands properly\n. Instruct them to cover both the front and back of each hand with soap and rinse thoroughly under warm water.\nCarry hand sanitizer or antibacterial wipes with you. They can come in handy when you don’t have access to soap and water. Find\nhand sanitizers\nand\nantibacterial wipes\nonline.\nAvoid touching your nose, mouth, or eyes. Doing so makes it easier for viruses and bacteria to enter your body and cause infection.\nCover your mouth when you cough and your nose when you sneeze. Teach your children to do the same.\nAvoid sharing cups, glasses, and eating utensils with other people.","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  - [Heart Health](https:\/\/www.healthline.com\/heart-health)\n  - [Menopause](https:\/\/www.healthline.com\/menopause)\n  - [Mental Health](https:\/\/www.healthline.com\/mental-health)\n  - [Migraine](https:\/\/www.healthline.com\/migraine)\n  - [Multiple Sclerosis (MS)](https:\/\/www.healthline.com\/multiple-sclerosis)\n  - [Parkinson’s Disease](https:\/\/www.healthline.com\/parkinsons-disease)\n  - [Psoriasis](https:\/\/www.healthline.com\/psoriasis)\n  - [Rheumatoid Arthritis (RA)](https:\/\/www.healthline.com\/rheumatoid-arthritis)\n  - [Sleep Health](https:\/\/www.healthline.com\/sleep)\n  - [Type 2 Diabetes](https:\/\/www.healthline.com\/type-2-diabetes)\n  - [Weight Management](https:\/\/www.healthline.com\/weight-management)\n  \n  Condition Spotlight\n  \n  [All](https:\/\/www.healthline.com\/sponsored-topics)\n  \n  - [![](https:\/\/media.post.rvohealth.io\/wp-content\/uploads\/2024\/12\/navigation-icons-_controlling-ulcerative-colitis-236x236_360.png) Controlling Ulcerative Colitis](https:\/\/www.healthline.com\/program\/controlling-uc)\n  - [![](https:\/\/media.post.rvohealth.io\/wp-content\/uploads\/2024\/12\/navigation-icons_navigating-life-with-biopolar-236x236-1.png) Navigating Life with Bipolar Disorder](https:\/\/www.healthline.com\/program\/navigating-life-with-bipolar-disorder)\n  - [![](https:\/\/media.post.rvohealth.io\/wp-content\/uploads\/2024\/12\/navigation-icons-_mastering-your-geographic-atrophy-236x236_360.png) Mastering Geographic Atrophy](https:\/\/www.healthline.com\/program\/mastering-your-geographic-atrophy-care)\n  - [![](https:\/\/media.post.rvohealth.io\/wp-content\/uploads\/2024\/12\/navigation-icons_managing-type-2-diabetes-236x236-1.png) Managing Type 2 Diabetes](https:\/\/www.healthline.com\/program\/managing-type-2-diabetes-with-food-and-fitness)\n- Wellness\n  Wellness Topics\n  \n  [All](https:\/\/www.healthline.com\/wellness)\n  \n  - [CBD](https:\/\/www.healthline.com\/cbd)\n  - [Fitness](https:\/\/www.healthline.com\/fitness)\n  - [Healthy Aging](https:\/\/www.healthline.com\/healthy-aging)\n  - [Hearing](https:\/\/www.healthline.com\/hearing-health)\n  - [Mental Well-Being](https:\/\/www.healthline.com\/mental-health)\n  - [Nutrition](https:\/\/www.healthline.com\/nutrition)\n  - [Parenthood](https:\/\/www.healthline.com\/parenthood)\n  - [Recipes](https:\/\/www.healthline.com\/recipes)\n  - [Sexual Health](https:\/\/www.healthline.com\/sexual-health)\n  - [Skin Care](https:\/\/www.healthline.com\/skincare)\n  - [Sleep Health](https:\/\/www.healthline.com\/sleep)\n  - [Vitamins and Supplements](https:\/\/www.healthline.com\/vitamins-supplements)\n  - 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[![](https:\/\/media.post.rvohealth.io\/wp-content\/uploads\/2024\/12\/navigation-icons-_understanding-inflammation-and-aging-236x236_360.png) Inflammation and Aging](https:\/\/www.healthline.com\/program\/understanding-inflammation-and-aging)\n  - [![](https:\/\/media.post.rvohealth.io\/wp-content\/uploads\/2024\/12\/navigation-icons-_cold-and-flu-236x236_360.png) Cold & Flu Season Survival Guide](https:\/\/www.healthline.com\/program\/cold-flu-survival-guide)\n  - [![](https:\/\/media.post.rvohealth.io\/wp-content\/uploads\/2024\/12\/navigation-icons_shes-good-for-real-236x236-1.png) She’s Good for Real](https:\/\/www.healthline.com\/program\/shes-good-for-real)\n- Tools\n  Featured\n  \n  - [Video Series](https:\/\/www.healthline.com\/video)\n  - [Pill Identifier](https:\/\/www.healthline.com\/pill-identifier)\n  - [FindCare](https:\/\/care.healthline.com\/find-care)\n  - [Drugs A-Z](https:\/\/www.healthline.com\/drugs)\n  - [Medicare Plans by State](https:\/\/www.healthline.com\/about\/health-medicare-state-coverage)\n  \n  Lessons\n  \n  [All](https:\/\/learn.healthline.com\/)\n  \n  - [Crohn’s and Ulcerative Colitis Essentials](https:\/\/www.healthline.com\/app\/inflammatory-bowel-disease?utm_source=lessonshome)\n  - [Diabetes Nutrition](https:\/\/www.healthline.com\/app\/type-2-diabetes?utm_source=lessonshome)\n  - [High Cholesterol](https:\/\/www.healthline.com\/app\/high-cholesterol?utm_source=lessonshome)\n  - [Taming Inflammation in Psoriasis](https:\/\/www.healthline.com\/app\/pso-inflammation?utm_source=lessonshome)\n  - [Taming Inflammation in Psoriatic Arthritis](https:\/\/www.healthline.com\/app\/psa-inflammation?utm_source=lessonshome)\n  \n  Newsletters\n  \n  [All](https:\/\/www.healthline.com\/newsletter-signup)\n  \n  - [Anxiety and Depression](https:\/\/www.healthline.com\/newsletter-signup\/anxiety-and-depression)\n  - [Digestive Health](https:\/\/www.healthline.com\/newsletter-signup\/ibd)\n  - [Heart Health](https:\/\/www.healthline.com\/newsletter-signup\/heart-health)\n  - [Migraine](https:\/\/www.healthline.com\/newsletter-signup\/migraine)\n  - 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[Can 6-6-6 Walking Workout Help You Lose Weight?](https:\/\/www.healthline.com\/health-news\/666-walking-trend-weight-loss)\n  - [This Couple Lost 118 Pounds Together Without Medication](https:\/\/www.healthline.com\/health-news\/married-couple-loses-119-pounds-together-without-meds)\n  - [5 Science-Backed Ways to Live a Longer Life](https:\/\/www.healthline.com\/health-news\/healthy-ways-to-improve-longevity)\n  - [Morning Coffee May Help You Live Longer](https:\/\/www.healthline.com\/health-news\/morning-coffee-heart-health-benefits)\n  \n  This Just In\n  \n  - [5 Tips for a Healthy Lifestyle](https:\/\/www.healthline.com\/health\/fitness-nutrition\/healthy-lifestyle-benefits)\n  - [How to Disinfect Your House After the Flu](https:\/\/www.healthline.com\/health\/flu\/how-to-disinfect-house-after-flu)\n  - [Best Vegan and Plant-Based Meal Delivery for 2025](https:\/\/www.healthline.com\/nutrition\/plant-based-meal-delivery)\n  - [Does Medicare Cover Pneumonia Shots?](https:\/\/www.healthline.com\/health\/medicare\/does-medicare-cover-pneumonia-shots)\n  - 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[Future of Health](https:\/\/www.healthline.com\/health\/video\/future-of-health)\n- Connect\n  Find Your Bezzy Community\n  \n  Bezzy communities provide meaningful connections with others living with chronic conditions. 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[ADHD](https:\/\/www.healthline.com\/adhd)\n\n- [Basics](https:\/\/www.healthline.com\/adhd\/basics)\n- [Medication & Treatments](https:\/\/www.healthline.com\/adhd\/medication-treatments)\n- [Holistic Health](https:\/\/www.healthline.com\/adhd\/holistic-health)\n- [Nutrition](https:\/\/www.healthline.com\/adhd\/nutrition)\n- Symptom Management\n  - [Guide](https:\/\/www.healthline.com\/adhd\/symptom-management)\n  - [Time & Productivity](https:\/\/www.healthline.com\/adhd\/symptom-management\/productivity)\n  - [Executive Function](https:\/\/www.healthline.com\/adhd\/symptom-management\/focus)\n  - [Emotional Regulation](https:\/\/www.healthline.com\/adhd\/symptom-management\/emotional-regulation)\n  - [Relationships & Communication](https:\/\/www.healthline.com\/adhd\/symptom-management\/communication)\n  - [Anxiety & Depressioin](https:\/\/www.healthline.com\/adhd\/symptom-management\/anxiety-depression)\n  - [Energy & Sleep](https:\/\/www.healthline.com\/adhd\/symptom-management\/energy-sleep)\n- [Support for Caregivers](https:\/\/www.healthline.com\/adhd\/caregivers)\n\nWe include products we think are useful for our readers. If you buy through links on this page, we may earn a small commission. [Here’s our process](https:\/\/www.healthline.com\/about\/brand-and-product-vetting)\n\n# Everything You Need to Know About Fever\n![](https:\/\/i0.wp.com\/post.healthline.com\/wp-content\/uploads\/2021\/04\/Cameron-White-MD-MPH-Mary-Morrison_edit.png?w=105&h=105)\n\n[Medically reviewed]() by [Cameron White, M.D., MPH]() — Written by Krista O'Connell —  [Updated on July 23, 2019]()\n\n- [What to look for](https:\/\/www.healthline.com\/health\/fever#what-to-look-for)\n- [Causes](https:\/\/www.healthline.com\/health\/fever#causes)\n- [Treatment](https:\/\/www.healthline.com\/health\/fever#treatment)\n- [When to seek help](https:\/\/www.healthline.com\/health\/fever#when-to-seek-help)\n- [Medical emergency](https:\/\/www.healthline.com\/health\/fever#medical-emergency)\n- [Prevention](https:\/\/www.healthline.com\/health\/fever#prevention)\n\n## Overview\nFever is also known as hyperthermia, pyrexia, or elevated temperature. It describes a body temperature that’s higher than normal. Fever can affect children and adults.\n\nA short-term increase in body temperature can help your body fight off illness. However, a severe fever can be a symptom of a serious condition that requires immediate medical attention.\n\n## [What to look for]()\nRecognizing a fever can enable you to get treatment and proper monitoring for it. Normal body temperature is typically around 98.6°F (37°C). However, the normal body temperature for each person can vary slightly.\n\nNormal body temperature may also fluctuate depending on the time of day. It tends to be lower in the morning and higher in the late afternoon and evening.\n\nOther factors, such as your [menstrual cycle](https:\/\/www.healthline.com\/health\/womens-health\/stages-of-menstrual-cycle) or intense exercise, can also affect body temperature.\n\nTo check you or your child’s temperature, you can use an oral, rectal, or axillary thermometer.\n\nAn oral thermometer should be placed under the tongue for three minutes.\n\n[Shop for oral thermometers.](https:\/\/www.amazon.com\/s?k=oral+thermometer&i=hpc&tag=healthline-subtag-20&ascsubtag=null&correlationId=null)\n\nYou may also use an oral thermometer for an axillary, or armpit, reading. Simply place the thermometer in the armpit and cross your arms or your child’s arms over the chest. Wait four to five minutes before removing the thermometer.\n\nA rectal thermometer may be used for measuring body temperature in infants. To do this:\n\n1. Place a small amount of petroleum jelly on the bulb.\n2. Lay your baby on their stomach and gently insert the thermometer about 1 inch into their rectum.\n3. Hold the bulb and your baby still for at least three minutes.\n\n[Find a selection of rectal thermometers online.](https:\/\/www.amazon.com\/s?k=rectal+thermometer&i=hpc&tag=healthline-subtag-20&ascsubtag=null&correlationId=null)\n\nIn general, a baby has a fever when their body temperature exceeds 100.4°F (38°C). A child has a fever when their temperature exceeds 99.5°F (37.5°C). An adult has a fever when their temperature exceeds 99–99.5°F (37.2–37.5°C).\n\n## [What usually causes a fever?]()\nFever occurs when a part of the brain called the [hypothalamus](https:\/\/www.healthline.com\/human-body-maps\/hypothalamus) shifts the set point of your normal body temperature upward. When this happens, you may feel chilled and add layers of clothing, or you may start [shivering](https:\/\/www.healthline.com\/health\/shivering) to generate more body heat. This eventually results in a higher body temperature.\n\nThere are numerous different conditions that can trigger a fever. Some possible causes include:\n\n- infections, including the [flu](https:\/\/www.healthline.com\/health\/influenza\/facts-and-statistics) and [pneumonia](https:\/\/www.healthline.com\/health\/pneumonia)\n- some immunizations, such as [diphtheria or tetanus](https:\/\/www.healthline.com\/health\/new-baby-vaccination-guide\/tdap-vaccine#1) (in children)\n- [teething](https:\/\/www.healthline.com\/health\/teething) (in infants)\n- some inflammatory diseases, including [rheumatoid arthritis (RA)](https:\/\/www.healthline.com\/health\/rheumatoid-arthritis) and [Crohn’s disease](https:\/\/www.healthline.com\/health\/crohns-disease)\n- [blood clots](https:\/\/www.healthline.com\/health\/how-to-tell-if-you-have-a-blood-clot)\n- [extreme sunburn](https:\/\/www.healthline.com\/health\/sun-poisoning)\n- [food poisoning](https:\/\/www.healthline.com\/health\/food-poisoning)\n- some medications, including [antibiotics](https:\/\/www.healthline.com\/health\/infection\/antibiotic-side-effects)\n\nDepending on the cause of the fever, additional symptoms may include:\n\n- sweating\n- shivering\n- [headache](https:\/\/www.healthline.com\/health\/headache)\n- [muscle aches](https:\/\/www.healthline.com\/health\/muscle-aches)\n- [loss of appetite](https:\/\/www.healthline.com\/health\/appetite-decreased)\n- [dehydration](https:\/\/www.healthline.com\/symptom\/dehydration)\n- general [weakness](https:\/\/www.healthline.com\/symptom\/asthenia)\n\n## [How to treat a fever at home]()\nCare for a fever depends on its severity. A low-grade fever with no other symptoms doesn’t typically require medical treatment. Drinking fluids and resting in bed are usually enough to fight off a fever.\n\nWhen a fever is accompanied by mild symptoms, such as general discomfort or dehydration, it can be helpful to treat elevated body temperature by:\n\n- making sure the room temperature where the person is resting is comfortable\n- taking a regular bath or a sponge bath using lukewarm water\n- taking [acetaminophen (Tylenol) or ibuprofen (Advil)](https:\/\/www.healthline.com\/health\/pain-relief\/ibuprofen-vs-acetaminophen)\n- drinking plenty of fluids\n\nPurchase [acetaminophen](https:\/\/www.amazon.com\/s?k=acetaminophen&i=hpc&tag=healthline-subtag-20&ascsubtag=null&correlationId=null) or [ibuprofen](https:\/\/www.amazon.com\/s?k=ibuprofen&i=hpc&tag=healthline-subtag-20&ascsubtag=null&correlationId=null) online.\n\n## [When to see a doctor about a fever]()\nA mild fever can typically be treated at home. In some cases, however, a fever can be a symptom of a serious medical condition that requires prompt treatment.\n\nYou should take your infant to a doctor if they’re:\n\n- younger than 3 months old and have a temperature exceeding 100.4°F (38°C)\n- between 3 and 6 months old, have a temperature over 102°F (38.9°C), and seem unusually irritable, [lethargic](https:\/\/www.healthline.com\/symptom\/lethargy), or uncomfortable\n- between 6 and 24 months old and have a temperature higher than 102°F (38.9°C) that lasts longer than one day\n\nYou should take your child to see a doctor if they:\n\n- have a body temperature exceeding 102.2°F (39°C)\n- have had a fever for more than three days\n- make poor eye contact with you\n- seem restless or irritable\n- have recently had one or more immunizations\n- have a serious medical illness or a compromised immune system\n- have recently been in a developing country\n\nYou should call your doctor if you:\n\n- have a body temperature exceeding 103°F (39.4°C)\n- have had a fever for more than three days\n- have a serious medical illness or a compromised immune system\n- have recently been in a developing country\n\nYou or your child should also see a doctor as soon as possible if a fever is accompanied by any of the following symptoms:\n\n- a severe headache\n- [throat swelling](https:\/\/www.healthline.com\/health\/tightness-in-throat)\n- a [skin rash](https:\/\/www.healthline.com\/health\/rashes), especially if the rash gets worse\n- sensitivity to bright light\n- a stiff neck and [neck pain](https:\/\/www.healthline.com\/health\/neck-pain)\n- persistent [vomiting](https:\/\/www.healthline.com\/symptom\/vomiting)\n- listlessness or irritability\n- [abdominal pain](https:\/\/www.healthline.com\/symptom\/abdominal-pain)\n- [pain when urinating](https:\/\/www.healthline.com\/health\/urination-painful)\n- [muscle weakness](https:\/\/www.healthline.com\/symptom\/muscle-weakness)\n- trouble breathing or chest pain\n- confusion\n\nYour doctor will probably perform a physical examination and medical tests. This will help them determine the cause of the fever and an effective course of treatment.\n\n## [When is a fever a medical emergency?]()\nGo to the nearest emergency room or call 911 if you or your child is experiencing any of the following:\n\n- [confusion](https:\/\/www.healthline.com\/symptom\/confusion)\n- an inability to walk\n- [trouble breathing](https:\/\/www.healthline.com\/symptom\/shortness-of-breath)\n- [chest pain](https:\/\/www.healthline.com\/health\/causes-of-chest-pain)\n- [seizures](https:\/\/www.healthline.com\/symptom\/seizures)\n- [hallucinations](https:\/\/www.healthline.com\/symptom\/hallucinations)\n- inconsolable crying (in children)\n\n## [How can a fever be prevented?]()\nLimiting exposure to infectious agents is one of the best ways to prevent a fever. Infectious agents often cause body temperature to rise. Here are some tips that can help reduce your exposure:\n\n- Wash your hands often, especially before eating, after using the toilet, and after being around large numbers of people.\n- Show your children how to [wash their hands properly](https:\/\/www.healthline.com\/health\/washing-hands). Instruct them to cover both the front and back of each hand with soap and rinse thoroughly under warm water.\n- Carry hand sanitizer or antibacterial wipes with you. They can come in handy when you don’t have access to soap and water. Find [hand sanitizers](https:\/\/amzn.to\/2yKiUlK?ascsubtag=null&correlationId=null) and [antibacterial wipes](https:\/\/amzn.to\/2CSZVdj?ascsubtag=null&correlationId=null) online.\n- Avoid touching your nose, mouth, or eyes. Doing so makes it easier for viruses and bacteria to enter your body and cause infection.\n- Cover your mouth when you cough and your nose when you sneeze. Teach your children to do the same.\n- Avoid sharing cups, glasses, and eating utensils with other people.\n\n### How we reviewed this article:\nSources\n\nHistory\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- Feverin children. (n.d.).  \n  <https:\/\/www.hopkinsmedicine.org\/health\/conditions-and-diseases\/fevers-in-children>\n- Fever in children. (n.d.).  \n  <https:\/\/www.stanfordchildrens.org\/en\/topic\/default?id=fever-in-children-90-P02512>\n- Lim T. (2015). Kids’ fevers: When to worry, whento relax.  \n  <https:\/\/health.clevelandclinic.org\/kids-fevers-when-to-worry-when-to-relax\/>\n- Mayo Clinic Staff. (2017). Fever.  \n  <https:\/\/www.mayoclinic.org\/diseases-conditions\/fever\/symptoms-causes\/syc-20352759>\n- Mayo Clinic Staff. (2019). Thermometerbasics: Taking your child’s temperature.  \n  <https:\/\/www.mayoclinic.org\/healthy-lifestyle\/infant-and-toddler-health\/in-depth\/thermometer\/art-20047410>\n\nShare this article\n\n![](https:\/\/i0.wp.com\/post.healthline.com\/wp-content\/uploads\/2021\/04\/Cameron-White-MD-MPH-Mary-Morrison_edit.png?w=105&h=105)\n\n[Medically reviewed]() by [Cameron White, M.D., MPH]() — Written by Krista O'Connell —  [Updated on July 23, 2019]()\n\n## related stories\n- [How to Safely Bring Down a Fever in a Baby](https:\/\/www.healthline.com\/health\/parenting\/how-to-bring-down-baby-fever?utm_source=ReadNext)\n- [4 Effective Fever Remedies](https:\/\/www.healthline.com\/health\/effective-fever-remedies?utm_source=ReadNext)\n- [Can Essential Oils Treat the Symptoms of a Fever?](https:\/\/www.healthline.com\/health\/essential-oils-for-fever?utm_source=ReadNext)\n- [Children’s Health Symptoms You Shouldn’t Ignore](https:\/\/www.healthline.com\/health\/childrens-health-symptoms?utm_source=ReadNext)\n- [What You Need to Know About How to Break a Fever](https:\/\/www.healthline.com\/health\/video\/how-to-break-a-fever?utm_source=ReadNext)\n\n### Read this next\n- [How to Safely Bring Down a Fever in a Baby](https:\/\/www.healthline.com\/health\/parenting\/how-to-bring-down-baby-fever?utm_source=ReadNext)\n  \n  Medically reviewed by [Mia Armstrong, MD](https:\/\/www.healthline.com\/medical-team)\n  \n  [If your baby is over 3 months old and has a fever, you may be able to treat them at home. Here are some ways to bring down a fever in a baby, plus…](https:\/\/www.healthline.com\/health\/parenting\/how-to-bring-down-baby-fever?utm_source=ReadNext)\n  \n  [READ MORE](https:\/\/www.healthline.com\/health\/parenting\/how-to-bring-down-baby-fever?utm_source=ReadNext)\n- [4 Effective Fever Remedies](https:\/\/www.healthline.com\/health\/effective-fever-remedies?utm_source=ReadNext)\n  \n  Medically reviewed by [Peggy Pletcher, M.S., R.D., L.D., CDE](https:\/\/www.healthline.com\/medical-team)\n  \n  [READ MORE](https:\/\/www.healthline.com\/health\/effective-fever-remedies?utm_source=ReadNext)\n- [Can Essential Oils Treat the Symptoms of a Fever?](https:\/\/www.healthline.com\/health\/essential-oils-for-fever?utm_source=ReadNext)\n  \n  Medically reviewed by [Debra Rose Wilson, Ph.D., MSN, R.N., IBCLC, AHN-BC, CHT](https:\/\/www.healthline.com\/medical-team)\n  \n  [Essential oils may help soothe fever symptoms. However, they cannot treat illness alone; you may still need medical attention.](https:\/\/www.healthline.com\/health\/essential-oils-for-fever?utm_source=ReadNext)\n  \n  [READ MORE](https:\/\/www.healthline.com\/health\/essential-oils-for-fever?utm_source=ReadNext)\n- [Children’s Health Symptoms You Shouldn’t Ignore](https:\/\/www.healthline.com\/health\/childrens-health-symptoms?utm_source=ReadNext)\n  \n  Medically reviewed by [Alana Biggers, M.D., MPH](https:\/\/www.healthline.com\/medical-team)\n  \n  [It's common for children to have minor colds and growing pains, but some physical symptoms can be a sign of a more serious health condition. Learn…](https:\/\/www.healthline.com\/health\/childrens-health-symptoms?utm_source=ReadNext)\n  \n  [READ MORE](https:\/\/www.healthline.com\/health\/childrens-health-symptoms?utm_source=ReadNext)\n- [What You Need to Know About How to Break a Fever](https:\/\/www.healthline.com\/health\/video\/how-to-break-a-fever?utm_source=ReadNext)\n  \n  Medically reviewed by [the Healthline Medical Network](https:\/\/www.healthline.com\/medical-team)\n  \n  [It's important to know how to break a fever. Resting, getting plenty of fluid, and staying cool, are all good ways to help your fever break.](https:\/\/www.healthline.com\/health\/video\/how-to-break-a-fever?utm_source=ReadNext)\n  \n  [READ MORE](https:\/\/www.healthline.com\/health\/video\/how-to-break-a-fever?utm_source=ReadNext)\n- [Why Are My Hands Always Warm?](https:\/\/www.healthline.com\/health\/warm-hands?utm_source=ReadNext)\n  \n  Medically reviewed by [Stacy Sampson, D.O.](https:\/\/www.healthline.com\/medical-team)\n  \n  [Have warm hands that aren't cooling down? We'll explain what could be causing it and how you can find relief.](https:\/\/www.healthline.com\/health\/warm-hands?utm_source=ReadNext)\n  \n  [READ MORE](https:\/\/www.healthline.com\/health\/warm-hands?utm_source=ReadNext)\n- [Everything You Should Know About Heatstroke](https:\/\/www.healthline.com\/health\/heat-stroke?utm_source=ReadNext)\n  \n  Medically reviewed by [Cynthia Taylor Chavoustie, MPAS, PA-C](https:\/\/www.healthline.com\/medical-team)\n  \n  [Heatstroke is a serious medical emergency. Learn how to identify the symptoms, what to do if you suspect heatstroke, and tips for prevention.](https:\/\/www.healthline.com\/health\/heat-stroke?utm_source=ReadNext)\n  \n  [READ MORE](https:\/\/www.healthline.com\/health\/heat-stroke?utm_source=ReadNext)\n- [What Is a Periodic Fever Syndrome?](https:\/\/www.healthline.com\/health\/periodic-fever-syndrome?utm_source=ReadNext)\n  \n  Medically reviewed by [Carissa Stephens, R.N., CCRN, CPN](https:\/\/www.healthline.com\/medical-team)\n  \n  [Periodic fever syndrome is a group of conditions that cause fevers and other symptoms. These syndromes are more common in kids but can also affect…](https:\/\/www.healthline.com\/health\/periodic-fever-syndrome?utm_source=ReadNext)\n  \n  [READ MORE](https:\/\/www.healthline.com\/health\/periodic-fever-syndrome?utm_source=ReadNext)\n- [Which Factors Affect Body Temperature?](https:\/\/www.healthline.com\/health\/video\/what-is-normal-body-temperature?utm_source=ReadNext)\n  \n  Medically reviewed by [the Healthline Medical Network](https:\/\/www.healthline.com\/medical-team)\n  \n  [Your body temperature may be above or below the “normal” body temperature of 98.6°F (37°C). Learn more about why.](https:\/\/www.healthline.com\/health\/video\/what-is-normal-body-temperature?utm_source=ReadNext)\n  \n  [READ MORE](https:\/\/www.healthline.com\/health\/video\/what-is-normal-body-temperature?utm_source=ReadNext)\n- [What Does It Mean if You Are Feeling Feverish but Have No Fever?](https:\/\/www.healthline.com\/health\/infection\/feeling-feverish-but-no-fever?utm_source=ReadNext)\n  \n  Medically reviewed by [Meredith Goodwin, MD, FAAFP](https:\/\/www.healthline.com\/medical-team)\n  \n  [If you're feeling feverish, but not running a temperature, several factors could be at play.](https:\/\/www.healthline.com\/health\/infection\/feeling-feverish-but-no-fever?utm_source=ReadNext)\n  \n  [READ MORE](https:\/\/www.healthline.com\/health\/infection\/feeling-feverish-but-no-fever?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\nFever is also known as hyperthermia, pyrexia, or elevated temperature. It describes a body temperature that’s higher than normal. Fever can affect children and adults.\n\nA short-term increase in body temperature can help your body fight off illness. However, a severe fever can be a symptom of a serious condition that requires immediate medical attention.\n\nRecognizing a fever can enable you to get treatment and proper monitoring for it. Normal body temperature is typically around 98.6°F (37°C). However, the normal body temperature for each person can vary slightly.\n\nNormal body temperature may also fluctuate depending on the time of day. It tends to be lower in the morning and higher in the late afternoon and evening.\n\nOther factors, such as your [menstrual cycle](https:\/\/www.healthline.com\/health\/womens-health\/stages-of-menstrual-cycle) or intense exercise, can also affect body temperature.\n\nTo check you or your child’s temperature, you can use an oral, rectal, or axillary thermometer.\n\nAn oral thermometer should be placed under the tongue for three minutes.\n\nYou may also use an oral thermometer for an axillary, or armpit, reading. Simply place the thermometer in the armpit and cross your arms or your child’s arms over the chest. Wait four to five minutes before removing the thermometer.\n\nA rectal thermometer may be used for measuring body temperature in infants. To do this:\n\n1. Place a small amount of petroleum jelly on the bulb.\n2. Lay your baby on their stomach and gently insert the thermometer about 1 inch into their rectum.\n3. Hold the bulb and your baby still for at least three minutes.\n\nIn general, a baby has a fever when their body temperature exceeds 100.4°F (38°C). A child has a fever when their temperature exceeds 99.5°F (37.5°C). An adult has a fever when their temperature exceeds 99–99.5°F (37.2–37.5°C).\n\nCare for a fever depends on its severity. A low-grade fever with no other symptoms doesn’t typically require medical treatment. Drinking fluids and resting in bed are usually enough to fight off a fever.\n\nWhen a fever is accompanied by mild symptoms, such as general discomfort or dehydration, it can be helpful to treat elevated body temperature by:\n\n- making sure the room temperature where the person is resting is comfortable\n- taking a regular bath or a sponge bath using lukewarm water\n- taking [acetaminophen (Tylenol) or ibuprofen (Advil)](https:\/\/www.healthline.com\/health\/pain-relief\/ibuprofen-vs-acetaminophen)\n- drinking plenty of fluids\n\nA mild fever can typically be treated at home. In some cases, however, a fever can be a symptom of a serious medical condition that requires prompt treatment.\n\nYou should take your infant to a doctor if they’re:\n\n- younger than 3 months old and have a temperature exceeding 100.4°F (38°C)\n- between 3 and 6 months old, have a temperature over 102°F (38.9°C), and seem unusually irritable, [lethargic](https:\/\/www.healthline.com\/symptom\/lethargy), or uncomfortable\n- between 6 and 24 months old and have a temperature higher than 102°F (38.9°C) that lasts longer than one day\n\nYou should take your child to see a doctor if they:\n\n- have a body temperature exceeding 102.2°F (39°C)\n- have had a fever for more than three days\n- make poor eye contact with you\n- seem restless or irritable\n- have recently had one or more immunizations\n- have a serious medical illness or a compromised immune system\n- have recently been in a developing country\n\nYou should call your doctor if you:\n\n- have a body temperature exceeding 103°F (39.4°C)\n- have had a fever for more than three days\n- have a serious medical illness or a compromised immune system\n- have recently been in a developing country\n\nYou or your child should also see a doctor as soon as possible if a fever is accompanied by any of the following symptoms:\n\n- a severe headache\n- [throat swelling](https:\/\/www.healthline.com\/health\/tightness-in-throat)\n- a [skin rash](https:\/\/www.healthline.com\/health\/rashes), especially if the rash gets worse\n- sensitivity to bright light\n- a stiff neck and [neck pain](https:\/\/www.healthline.com\/health\/neck-pain)\n- persistent [vomiting](https:\/\/www.healthline.com\/symptom\/vomiting)\n- listlessness or irritability\n- [abdominal pain](https:\/\/www.healthline.com\/symptom\/abdominal-pain)\n- [pain when urinating](https:\/\/www.healthline.com\/health\/urination-painful)\n- [muscle weakness](https:\/\/www.healthline.com\/symptom\/muscle-weakness)\n- trouble breathing or chest pain\n- confusion\n\nYour doctor will probably perform a physical examination and medical tests. This will help them determine the cause of the fever and an effective course of treatment.\n\nLimiting exposure to infectious agents is one of the best ways to prevent a fever. Infectious agents often cause body temperature to rise. Here are some tips that can help reduce your exposure:\n\n- Wash your hands often, especially before eating, after using the toilet, and after being around large numbers of people.\n- Show your children how to [wash their hands properly](https:\/\/www.healthline.com\/health\/washing-hands). Instruct them to cover both the front and back of each hand with soap and rinse thoroughly under warm water.\n- Carry hand sanitizer or antibacterial wipes with you. They can come in handy when you don’t have access to soap and water. Find [hand sanitizers](https:\/\/amzn.to\/2yKiUlK?ascsubtag=null&correlationId=null) and [antibacterial wipes](https:\/\/amzn.to\/2CSZVdj?ascsubtag=null&correlationId=null) online.\n- Avoid touching your nose, mouth, or eyes. Doing so makes it easier for viruses and bacteria to enter your body and cause infection.\n- Cover your mouth when you cough and your nose when you sneeze. Teach your children to do the same.\n- Avoid sharing cups, glasses, and eating utensils with other people.","meta_canonical":null}

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Meta Description	Find information on the causes, treatment, and prevention of fever. Learn when you should see a doctor about a fever.
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Boilerpipe Text	Overview Fever is also known as hyperthermia, pyrexia, or elevated temperature. It describes a body temperature that’s higher than normal. Fever can affect children and adults. A short-term increase in body temperature can help your body fight off illness. However, a severe fever can be a symptom of a serious condition that requires immediate medical attention. Recognizing a fever can enable you to get treatment and proper monitoring for it. Normal body temperature is typically around 98.6°F (37°C). However, the normal body temperature for each person can vary slightly. Normal body temperature may also fluctuate depending on the time of day. It tends to be lower in the morning and higher in the late afternoon and evening. Other factors, such as your menstrual cycle or intense exercise, can also affect body temperature. To check you or your child’s temperature, you can use an oral, rectal, or axillary thermometer. An oral thermometer should be placed under the tongue for three minutes. You may also use an oral thermometer for an axillary, or armpit, reading. Simply place the thermometer in the armpit and cross your arms or your child’s arms over the chest. Wait four to five minutes before removing the thermometer. A rectal thermometer may be used for measuring body temperature in infants. To do this: Place a small amount of petroleum jelly on the bulb. Lay your baby on their stomach and gently insert the thermometer about 1 inch into their rectum. Hold the bulb and your baby still for at least three minutes. In general, a baby has a fever when their body temperature exceeds 100.4°F (38°C). A child has a fever when their temperature exceeds 99.5°F (37.5°C). An adult has a fever when their temperature exceeds 99–99.5°F (37.2–37.5°C). Care for a fever depends on its severity. A low-grade fever with no other symptoms doesn’t typically require medical treatment. Drinking fluids and resting in bed are usually enough to fight off a fever. When a fever is accompanied by mild symptoms, such as general discomfort or dehydration, it can be helpful to treat elevated body temperature by: making sure the room temperature where the person is resting is comfortable taking a regular bath or a sponge bath using lukewarm water taking acetaminophen (Tylenol) or ibuprofen (Advil) drinking plenty of fluids A mild fever can typically be treated at home. In some cases, however, a fever can be a symptom of a serious medical condition that requires prompt treatment. You should take your infant to a doctor if they’re: younger than 3 months old and have a temperature exceeding 100.4°F (38°C) between 3 and 6 months old, have a temperature over 102°F (38.9°C), and seem unusually irritable, lethargic , or uncomfortable between 6 and 24 months old and have a temperature higher than 102°F (38.9°C) that lasts longer than one day You should take your child to see a doctor if they: have a body temperature exceeding 102.2°F (39°C) have had a fever for more than three days make poor eye contact with you seem restless or irritable have recently had one or more immunizations have a serious medical illness or a compromised immune system have recently been in a developing country You should call your doctor if you: have a body temperature exceeding 103°F (39.4°C) have had a fever for more than three days have a serious medical illness or a compromised immune system have recently been in a developing country You or your child should also see a doctor as soon as possible if a fever is accompanied by any of the following symptoms: a severe headache throat swelling a skin rash , especially if the rash gets worse sensitivity to bright light a stiff neck and neck pain persistent vomiting listlessness or irritability abdominal pain pain when urinating muscle weakness trouble breathing or chest pain confusion Your doctor will probably perform a physical examination and medical tests. This will help them determine the cause of the fever and an effective course of treatment. Limiting exposure to infectious agents is one of the best ways to prevent a fever. Infectious agents often cause body temperature to rise. Here are some tips that can help reduce your exposure: Wash your hands often, especially before eating, after using the toilet, and after being around large numbers of people. Show your children how to wash their hands properly . Instruct them to cover both the front and back of each hand with soap and rinse thoroughly under warm water. Carry hand sanitizer or antibacterial wipes with you. They can come in handy when you don’t have access to soap and water. Find hand sanitizers and antibacterial wipes online. Avoid touching your nose, mouth, or eyes. Doing so makes it easier for viruses and bacteria to enter your body and cause infection. Cover your mouth when you cough and your nose when you sneeze. Teach your children to do the same. Avoid sharing cups, glasses, and eating utensils with other people.
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If you buy through links on this page, we may earn a small commission. [Here’s our process](https://www.healthline.com/about/brand-and-product-vetting) # Everything You Need to Know About Fever ![](https://i0.wp.com/post.healthline.com/wp-content/uploads/2021/04/Cameron-White-MD-MPH-Mary-Morrison_edit.png?w=105&h=105) [Medically reviewed]() by [Cameron White, M.D., MPH]() — Written by Krista O'Connell — [Updated on July 23, 2019]() - [What to look for](https://www.healthline.com/health/fever#what-to-look-for) - [Causes](https://www.healthline.com/health/fever#causes) - [Treatment](https://www.healthline.com/health/fever#treatment) - [When to seek help](https://www.healthline.com/health/fever#when-to-seek-help) - [Medical emergency](https://www.healthline.com/health/fever#medical-emergency) - [Prevention](https://www.healthline.com/health/fever#prevention) ## Overview Fever is also known as hyperthermia, pyrexia, or elevated temperature. It describes a body temperature that’s higher than normal. Fever can affect children and adults. A short-term increase in body temperature can help your body fight off illness. However, a severe fever can be a symptom of a serious condition that requires immediate medical attention. ## [What to look for]() Recognizing a fever can enable you to get treatment and proper monitoring for it. Normal body temperature is typically around 98.6°F (37°C). However, the normal body temperature for each person can vary slightly. Normal body temperature may also fluctuate depending on the time of day. It tends to be lower in the morning and higher in the late afternoon and evening. Other factors, such as your [menstrual cycle](https://www.healthline.com/health/womens-health/stages-of-menstrual-cycle) or intense exercise, can also affect body temperature. To check you or your child’s temperature, you can use an oral, rectal, or axillary thermometer. An oral thermometer should be placed under the tongue for three minutes. [Shop for oral thermometers.](https://www.amazon.com/s?k=oral+thermometer&i=hpc&tag=healthline-subtag-20&ascsubtag=null&correlationId=null) You may also use an oral thermometer for an axillary, or armpit, reading. Simply place the thermometer in the armpit and cross your arms or your child’s arms over the chest. Wait four to five minutes before removing the thermometer. A rectal thermometer may be used for measuring body temperature in infants. To do this: 1. Place a small amount of petroleum jelly on the bulb. 2. Lay your baby on their stomach and gently insert the thermometer about 1 inch into their rectum. 3. Hold the bulb and your baby still for at least three minutes. [Find a selection of rectal thermometers online.](https://www.amazon.com/s?k=rectal+thermometer&i=hpc&tag=healthline-subtag-20&ascsubtag=null&correlationId=null) In general, a baby has a fever when their body temperature exceeds 100.4°F (38°C). A child has a fever when their temperature exceeds 99.5°F (37.5°C). An adult has a fever when their temperature exceeds 99–99.5°F (37.2–37.5°C). ## [What usually causes a fever?]() Fever occurs when a part of the brain called the [hypothalamus](https://www.healthline.com/human-body-maps/hypothalamus) shifts the set point of your normal body temperature upward. When this happens, you may feel chilled and add layers of clothing, or you may start [shivering](https://www.healthline.com/health/shivering) to generate more body heat. This eventually results in a higher body temperature. There are numerous different conditions that can trigger a fever. Some possible causes include: - infections, including the [flu](https://www.healthline.com/health/influenza/facts-and-statistics) and [pneumonia](https://www.healthline.com/health/pneumonia) - some immunizations, such as [diphtheria or tetanus](https://www.healthline.com/health/new-baby-vaccination-guide/tdap-vaccine#1) (in children) - [teething](https://www.healthline.com/health/teething) (in infants) - some inflammatory diseases, including [rheumatoid arthritis (RA)](https://www.healthline.com/health/rheumatoid-arthritis) and [Crohn’s disease](https://www.healthline.com/health/crohns-disease) - [blood clots](https://www.healthline.com/health/how-to-tell-if-you-have-a-blood-clot) - [extreme sunburn](https://www.healthline.com/health/sun-poisoning) - [food poisoning](https://www.healthline.com/health/food-poisoning) - some medications, including [antibiotics](https://www.healthline.com/health/infection/antibiotic-side-effects) Depending on the cause of the fever, additional symptoms may include: - sweating - shivering - [headache](https://www.healthline.com/health/headache) - [muscle aches](https://www.healthline.com/health/muscle-aches) - [loss of appetite](https://www.healthline.com/health/appetite-decreased) - [dehydration](https://www.healthline.com/symptom/dehydration) - general [weakness](https://www.healthline.com/symptom/asthenia) ## [How to treat a fever at home]() Care for a fever depends on its severity. A low-grade fever with no other symptoms doesn’t typically require medical treatment. Drinking fluids and resting in bed are usually enough to fight off a fever. When a fever is accompanied by mild symptoms, such as general discomfort or dehydration, it can be helpful to treat elevated body temperature by: - making sure the room temperature where the person is resting is comfortable - taking a regular bath or a sponge bath using lukewarm water - taking [acetaminophen (Tylenol) or ibuprofen (Advil)](https://www.healthline.com/health/pain-relief/ibuprofen-vs-acetaminophen) - drinking plenty of fluids Purchase [acetaminophen](https://www.amazon.com/s?k=acetaminophen&i=hpc&tag=healthline-subtag-20&ascsubtag=null&correlationId=null) or [ibuprofen](https://www.amazon.com/s?k=ibuprofen&i=hpc&tag=healthline-subtag-20&ascsubtag=null&correlationId=null) online. ## [When to see a doctor about a fever]() A mild fever can typically be treated at home. In some cases, however, a fever can be a symptom of a serious medical condition that requires prompt treatment. You should take your infant to a doctor if they’re: - younger than 3 months old and have a temperature exceeding 100.4°F (38°C) - between 3 and 6 months old, have a temperature over 102°F (38.9°C), and seem unusually irritable, [lethargic](https://www.healthline.com/symptom/lethargy), or uncomfortable - between 6 and 24 months old and have a temperature higher than 102°F (38.9°C) that lasts longer than one day You should take your child to see a doctor if they: - have a body temperature exceeding 102.2°F (39°C) - have had a fever for more than three days - make poor eye contact with you - seem restless or irritable - have recently had one or more immunizations - have a serious medical illness or a compromised immune system - have recently been in a developing country You should call your doctor if you: - have a body temperature exceeding 103°F (39.4°C) - have had a fever for more than three days - have a serious medical illness or a compromised immune system - have recently been in a developing country You or your child should also see a doctor as soon as possible if a fever is accompanied by any of the following symptoms: - a severe headache - [throat swelling](https://www.healthline.com/health/tightness-in-throat) - a [skin rash](https://www.healthline.com/health/rashes), especially if the rash gets worse - sensitivity to bright light - a stiff neck and [neck pain](https://www.healthline.com/health/neck-pain) - persistent [vomiting](https://www.healthline.com/symptom/vomiting) - listlessness or irritability - [abdominal pain](https://www.healthline.com/symptom/abdominal-pain) - [pain when urinating](https://www.healthline.com/health/urination-painful) - [muscle weakness](https://www.healthline.com/symptom/muscle-weakness) - trouble breathing or chest pain - confusion Your doctor will probably perform a physical examination and medical tests. This will help them determine the cause of the fever and an effective course of treatment. ## [When is a fever a medical emergency?]() Go to the nearest emergency room or call 911 if you or your child is experiencing any of the following: - [confusion](https://www.healthline.com/symptom/confusion) - an inability to walk - [trouble breathing](https://www.healthline.com/symptom/shortness-of-breath) - [chest pain](https://www.healthline.com/health/causes-of-chest-pain) - [seizures](https://www.healthline.com/symptom/seizures) - [hallucinations](https://www.healthline.com/symptom/hallucinations) - inconsolable crying (in children) ## [How can a fever be prevented?]() Limiting exposure to infectious agents is one of the best ways to prevent a fever. Infectious agents often cause body temperature to rise. Here are some tips that can help reduce your exposure: - Wash your hands often, especially before eating, after using the toilet, and after being around large numbers of people. - Show your children how to [wash their hands properly](https://www.healthline.com/health/washing-hands). Instruct them to cover both the front and back of each hand with soap and rinse thoroughly under warm water. - Carry hand sanitizer or antibacterial wipes with you. They can come in handy when you don’t have access to soap and water. Find [hand sanitizers](https://amzn.to/2yKiUlK?ascsubtag=null&correlationId=null) and [antibacterial wipes](https://amzn.to/2CSZVdj?ascsubtag=null&correlationId=null) online. - Avoid touching your nose, mouth, or eyes. Doing so makes it easier for viruses and bacteria to enter your body and cause infection. - Cover your mouth when you cough and your nose when you sneeze. Teach your children to do the same. - Avoid sharing cups, glasses, and eating utensils with other people. ### How we reviewed this article: Sources History 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). - Feverin children. (n.d.). <https://www.hopkinsmedicine.org/health/conditions-and-diseases/fevers-in-children> - Fever in children. (n.d.). <https://www.stanfordchildrens.org/en/topic/default?id=fever-in-children-90-P02512> - Lim T. (2015). Kids’ fevers: When to worry, whento relax. <https://health.clevelandclinic.org/kids-fevers-when-to-worry-when-to-relax/> - Mayo Clinic Staff. (2017). Fever. <https://www.mayoclinic.org/diseases-conditions/fever/symptoms-causes/syc-20352759> - Mayo Clinic Staff. (2019). Thermometerbasics: Taking your child’s temperature. <https://www.mayoclinic.org/healthy-lifestyle/infant-and-toddler-health/in-depth/thermometer/art-20047410> Share this article ![](https://i0.wp.com/post.healthline.com/wp-content/uploads/2021/04/Cameron-White-MD-MPH-Mary-Morrison_edit.png?w=105&h=105) [Medically reviewed]() by [Cameron White, M.D., MPH]() — Written by Krista O'Connell — [Updated on July 23, 2019]() ## related stories - [How to Safely Bring Down a Fever in a Baby](https://www.healthline.com/health/parenting/how-to-bring-down-baby-fever?utm_source=ReadNext) - [4 Effective Fever Remedies](https://www.healthline.com/health/effective-fever-remedies?utm_source=ReadNext) - [Can Essential Oils Treat the Symptoms of a Fever?](https://www.healthline.com/health/essential-oils-for-fever?utm_source=ReadNext) - [Children’s Health Symptoms You Shouldn’t Ignore](https://www.healthline.com/health/childrens-health-symptoms?utm_source=ReadNext) - [What You Need to Know About How to Break a Fever](https://www.healthline.com/health/video/how-to-break-a-fever?utm_source=ReadNext) ### Read this next - [How to Safely Bring Down a Fever in a Baby](https://www.healthline.com/health/parenting/how-to-bring-down-baby-fever?utm_source=ReadNext) Medically reviewed by [Mia Armstrong, MD](https://www.healthline.com/medical-team) [If your baby is over 3 months old and has a fever, you may be able to treat them at home. 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Readable Markdown	## Overview Fever is also known as hyperthermia, pyrexia, or elevated temperature. It describes a body temperature that’s higher than normal. Fever can affect children and adults. A short-term increase in body temperature can help your body fight off illness. However, a severe fever can be a symptom of a serious condition that requires immediate medical attention. Recognizing a fever can enable you to get treatment and proper monitoring for it. Normal body temperature is typically around 98.6°F (37°C). However, the normal body temperature for each person can vary slightly. Normal body temperature may also fluctuate depending on the time of day. It tends to be lower in the morning and higher in the late afternoon and evening. Other factors, such as your [menstrual cycle](https://www.healthline.com/health/womens-health/stages-of-menstrual-cycle) or intense exercise, can also affect body temperature. To check you or your child’s temperature, you can use an oral, rectal, or axillary thermometer. An oral thermometer should be placed under the tongue for three minutes. You may also use an oral thermometer for an axillary, or armpit, reading. Simply place the thermometer in the armpit and cross your arms or your child’s arms over the chest. Wait four to five minutes before removing the thermometer. A rectal thermometer may be used for measuring body temperature in infants. To do this: 1. Place a small amount of petroleum jelly on the bulb. 2. Lay your baby on their stomach and gently insert the thermometer about 1 inch into their rectum. 3. Hold the bulb and your baby still for at least three minutes. In general, a baby has a fever when their body temperature exceeds 100.4°F (38°C). A child has a fever when their temperature exceeds 99.5°F (37.5°C). An adult has a fever when their temperature exceeds 99–99.5°F (37.2–37.5°C). Care for a fever depends on its severity. A low-grade fever with no other symptoms doesn’t typically require medical treatment. Drinking fluids and resting in bed are usually enough to fight off a fever. When a fever is accompanied by mild symptoms, such as general discomfort or dehydration, it can be helpful to treat elevated body temperature by: - making sure the room temperature where the person is resting is comfortable - taking a regular bath or a sponge bath using lukewarm water - taking [acetaminophen (Tylenol) or ibuprofen (Advil)](https://www.healthline.com/health/pain-relief/ibuprofen-vs-acetaminophen) - drinking plenty of fluids A mild fever can typically be treated at home. In some cases, however, a fever can be a symptom of a serious medical condition that requires prompt treatment. You should take your infant to a doctor if they’re: - younger than 3 months old and have a temperature exceeding 100.4°F (38°C) - between 3 and 6 months old, have a temperature over 102°F (38.9°C), and seem unusually irritable, [lethargic](https://www.healthline.com/symptom/lethargy), or uncomfortable - between 6 and 24 months old and have a temperature higher than 102°F (38.9°C) that lasts longer than one day You should take your child to see a doctor if they: - have a body temperature exceeding 102.2°F (39°C) - have had a fever for more than three days - make poor eye contact with you - seem restless or irritable - have recently had one or more immunizations - have a serious medical illness or a compromised immune system - have recently been in a developing country You should call your doctor if you: - have a body temperature exceeding 103°F (39.4°C) - have had a fever for more than three days - have a serious medical illness or a compromised immune system - have recently been in a developing country You or your child should also see a doctor as soon as possible if a fever is accompanied by any of the following symptoms: - a severe headache - [throat swelling](https://www.healthline.com/health/tightness-in-throat) - a [skin rash](https://www.healthline.com/health/rashes), especially if the rash gets worse - sensitivity to bright light - a stiff neck and [neck pain](https://www.healthline.com/health/neck-pain) - persistent [vomiting](https://www.healthline.com/symptom/vomiting) - listlessness or irritability - [abdominal pain](https://www.healthline.com/symptom/abdominal-pain) - [pain when urinating](https://www.healthline.com/health/urination-painful) - [muscle weakness](https://www.healthline.com/symptom/muscle-weakness) - trouble breathing or chest pain - confusion Your doctor will probably perform a physical examination and medical tests. This will help them determine the cause of the fever and an effective course of treatment. Limiting exposure to infectious agents is one of the best ways to prevent a fever. Infectious agents often cause body temperature to rise. Here are some tips that can help reduce your exposure: - Wash your hands often, especially before eating, after using the toilet, and after being around large numbers of people. - Show your children how to [wash their hands properly](https://www.healthline.com/health/washing-hands). Instruct them to cover both the front and back of each hand with soap and rinse thoroughly under warm water. - Carry hand sanitizer or antibacterial wipes with you. They can come in handy when you don’t have access to soap and water. Find [hand sanitizers](https://amzn.to/2yKiUlK?ascsubtag=null&correlationId=null) and [antibacterial wipes](https://amzn.to/2CSZVdj?ascsubtag=null&correlationId=null) online. - Avoid touching your nose, mouth, or eyes. Doing so makes it easier for viruses and bacteria to enter your body and cause infection. - Cover your mouth when you cough and your nose when you sneeze. Teach your children to do the same. - Avoid sharing cups, glasses, and eating utensils with other people.
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