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

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   A fever is when your body temperature rises higher than normal. A fever itself isn’t an illness. Rather, it’s a symptom of a wide range of health conditions. When your body temperature rises a few degrees above normal, it can be a sign that your immune system has been activated, often to fight an infection. It can also be a side effect of ...

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

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   May 7, 2022 · Has a fever that lasts longer than three days. Has a seizure associated with the fever. Call 911 if the seizure lasts more than five minutes or your child doesn't recover quickly. Ask your child's health care provider for guidance in special circumstances, such as a child with immune system problems or with a preexisting illness. Adults

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

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   May 22, 2023 · Causes of fever. An infection, such as the flu, is the most common cause of fever. Other conditions can also cause a fever. These include diseases that produce inflammation, such as rheumatoid arthritis; reactions to drugs or vaccines; and even certain types of cancers. Accompanying symptoms. The following symptoms may also accompany fever ...

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

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   Nov 15, 2023 · A fever is a sign of an illness or infection. When you have one, you may notice these symptoms: Chills or shivering; Sweating; Body aches; Headache; Lethargy (feeling weak) Being irritable;

5. patient.info › signs-symptoms › feverFever (High Temperature): Causes, Symptoms, and Treatment

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   Sep 8, 2024 · High temperature (fever) is caused by the release of certain chemicals by the immune system, usually as a result of infection or inflammation. Most fevers are caused by infections or other illnesses. Viral infections are the commonest causes of a fever.

6. www.health.harvard.edu › a_to_z › fever-a-to-zFever - Harvard Health

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   Apr 3, 2023 · Fever may help to fight infection, so there is a controversy about whether fever should be treated routinely or only if it is particularly severe. Caution regarding aspirin in children and teenagers. Aspirin should not be given to infants and children younger than age 16 unless specifically prescribed by their doctor.

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   Is a fever an illness?

   • Last reviewed on 05/31/2023. Learn more about the Health Library and our editorial process. A fever is when your body temperature rises higher than normal. A fever itself isn’t an illness. Rather, it’s a symptom for a wide range of health conditions.

   Fever Symptoms & Causes: What Is Considered a Fever? - Cleveland Cli…

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   What does a fever mean?

   • A fever is an increase in body temperature above the normal range. However, body temperature varies between people, with different levels of activity and at different times of the day. Medical textbooks differ in their definition of the highest normal body temperature.

   Fever - Harvard Health

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   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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   What causes a fever?

   • Infection is a common cause of fever, but other conditions can also bring the heat. Fever is one of the body's most effective ways of fighting infection. It is part of your body's defense against infection-causing germs. You get a fever most often when your body is trying to kill infectious invaders such as viruses or bacteria.

   Fever in adults: When to worry - Harvard Health

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   What if a bacterial infection causes a fever?

   • If your doctor suspects that a bacterial infection is causing your fever, he or she will prescribe antibiotics. Adults and children should seek immediate medical attention for any fever of 104 degrees Fahrenheit or higher or for any fever accompanied by one or more of the following: Urinary tract symptoms (pain on urination, foul-smelling urine).

   Fever - Harvard Health

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8. www.hopkinsmedicine.org › health › conditions-andFever - Johns Hopkins Medicine

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   What causes a fever? A fever is not an illness by itself. Rather it is a symptom that something is not right within the body. A fever does not tell you what is causing it, or even that a disease is present. It may be a bacterial or viral infection. Or, it could be a reaction from an allergy to food or medicine.