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1. www.health.harvard.edu › treating-fever-in-adultsFever in adults: when to worry - Harvard Health

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   May 22, 2023 · When to worry about fever. If you have a fever over 104°F (40°C), you should call your doctor. Seek medical help right away if you have a fever along with any of these symptoms: seizure; loss of consciousness; confusion; stiff neck; trouble breathing; severe pain anywhere in the body; swelling or inflammation of any part of the body

   • Email: hhp_info@health.harvard.edu

2. www.healthline.com › health › cold-fluFever in Adults: Characteristics, Types, and When It's Serious

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   Sep 17, 2019 · A fever is usually a sign that your immune system is busy fighting an infection or other illness. In babies and toddlers even a slight fever may be a sign of a serious illness. In adults a...

3. my.clevelandclinic.org › health › symptomsFever Symptoms & Causes: What Is Considered a Fever?

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   May 31, 2023 · A fever is when your body temperature is higher than your normal average temp. Most providers say a fever is either 100.0 F (37.8 C) or 100.4 F (38 C). When you have a fever, it’s your body’s normal response to fighting an infection or illness. Fevers usually aren’t a serious concern.

4. www.mayoclinic.org › diseases-conditions › feverFever - Symptoms and causes - Mayo Clinic

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   May 7, 2022 · Fevers below 104 F (40 C) associated with common viral infections, such as the flu, may help the immune system fight disease and are generally not harmful. Fever or elevated body temperature might be caused by: A viral infection; A bacterial infection; Heat exhaustion

5. www.verywellhealth.com › fever-8685009Fever: Temperature Range, What’s Serious, Breaking It

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   Aug 21, 2024 · Fever is an elevation in the body's temperature. It's not a disease but rather a sign or response to something occurring within the body, most commonly an infection. Noninfectious conditions or scenarios like inflammatory diseases or medication reactions can also cause a fever.

   • Author: Colleen Doherty, MD

6. www.webmd.com › first-aid › fevers-causes-symptomsFever: Causes, Symptoms, and Treatment - WebMD

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   Nov 15, 2023 · A fever is a sure sign your body is fighting off some type of infection. (Photo credit: E+/Getty Images) A fever is when you have a brief rise in body temperature that’s higher than your normal...

7. People also ask

   Is a fever a sign of a serious infection?

   • A fever is a temporary rise in body temperature. It's one part of an overall response from the body's immune system. A fever is usually caused by an infection. For most children and adults, a fever may be uncomfortable. But it usually isn't a cause for concern. For infants, however, even a low fever may mean there's a serious infection.

   Fever - Symptoms and causes - Mayo Clinic

   www.mayoclinic.org/diseases-conditions/fever/symptoms-causes/syc-20352759 

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   Can you get sick if you have a fever?

   • Better thermometers. We may have more accurate thermometers than people did a century ago. Despite the new research, doctors generally don’t consider you to have a fever until your temperature is at or above 100 F. But you can be sick if it’s lower than that.

   Fever Symptoms & Causes: What Is Considered a Fever? - WebMD

   www.webmd.com/covid/what-is-a-fever

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   Is fever a symptom of a viral infection?

   • No formal or standard definition exists for fever, as it can vary depending on age, time of day, and where it's measured on the body (e.g., mouth, rectal, ear, underarm, or forehead). Most cases of fever are due to viral infections.

   Fever: Temperature Range, What’s Serious, Breaking It - Verywell Health

   www.verywellhealth.com/fever-8685009

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   Should I Worry If I have a fever?

   • If you have a chronic condition or have been treated for a serious illness, let your doctor know if you have any kind of fever. A fever in adults is usually not something to worry about, but if the fever is very high or lasts for longer than 3 days, it could be the cause of a more serious illness.

   Fever in Adults: Characteristics, Types, and When It's Serious - Healthline

   www.healthline.com/health/cold-flu/fever-in-adults

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   What is a fever a sign of?

   • What Is a Fever? A fever is a sure sign your body is fighting off some type of infection. (Photo credit: E+/Getty Images) A fever is when you have a brief rise in body temperature that’s higher than your normal body temperature. It’s also called a high temperature, hyperthermia, or pyrexia.

   Fever: Causes, Symptoms, and Treatment - WebMD

   www.webmd.com/first-aid/fevers-causes-symptoms-treatments

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8. www.webmd.com › covid › what-is-a-feverFever Symptoms & Causes: What Is Considered a Fever? - WebMD

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   Jun 20, 2024 · A fever is when your body temperature is higher than usual, often due to an infection or illness. Doctors generally consider a fever to be an oral temperature of 100 F (37.8 C) or higher.