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1. • Isn’t an illness

     • 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 some medications and vaccinations.
     my.clevelandclinic.org/health/symptoms/10880-fever

     Fever Symptoms & Causes: What Is Considered a Fever?

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

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   May 7, 2022 · 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.

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

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   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.

4. www.msdmanuals.com › feverFever - Fever - MSD Manual Professional Edition

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   Fever is an elevated body temperature that occurs when the body's thermostat (located in the hypothalamus) resets at a higher temperature, primarily in response to an infection. Elevated body temperature that is not caused by a resetting of the temperature set point is called hyperthermia. Normal body temperature varies by.

   • Author: Larry M. Bush

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

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   Nov 15, 2023 · Adults. 100.4 F (oral temperature) A low-grade fever is when you have a temperature that is slightly higher than normal, usually around 99.5 to 100.3 F. A low-grade fever signals that something...

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

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   Sep 8, 2024 · What causes a fever? 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.

7. www.healthline.com › health › feverFever: Causes, Treatment, and Prevention - Healthline

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   Jul 23, 2019 · 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...

8. People also ask

   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 causes a fever?

   • Viral infections are the commonest causes of a fever. The high body temperature makes it more difficult for the germs (bacteria or viruses) which cause infections to survive. Common conditions that can cause fevers include: Respiratory tract infections and colds: see the separate leaflet called Common cold (Upper respiratory tract infections).

   Fever (High Temperature): Causes, Symptoms, and Treatment - Patient

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

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   Apr 3, 2023 · Symptoms. Common symptoms associated with fever include sweating, shivering, headaches, muscle aches, poor appetite, rash, restlessness and general body weakness. High fever can lead to symptoms of mental dysfunction, such as confusion, excessive sleepiness, irritability and convulsions (seizures).