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1. 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 a sign of infection or other illness in adults. Learn about the types, causes, and treatments of fever, and when to seek medical help.

2. 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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3. www.mayoclinic.org › diseases-conditions › feverFever - Symptoms & 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.

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

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   What are the most common causes of fever? A fever has many causes and can be a symptom of almost any illness. Common conditions that cause fever include: Bacterial infections. Viral infections such as influenza or COVID-19. Gastrointestinal (GI) infections. Urinary tract infections. Skin infections. You may also develop a fever due to:

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

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   Nov 15, 2023 · What Causes Fever? A fever can be a sign of several health conditions, which may or may not need medical treatment. The most common causes are infections such as colds and stomach...

6. www.medicalnewstoday.com › articles › fever-in-adultsFever in adults: Symptoms, treatment, and when to seek help

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   Mar 31, 2020 · Causes may include: Gram-negative bacteria: These are bacteria that can cause pneumonia, bloodstream infections, and surgical site infections. Typhoid: Typhoid is a bacterial infection that...

7. People also ask

   What causes a fever?

   • A fever is normally a short-term rise in temperature that helps your body get rid of illness. A fever begins when your immune system makes more white blood cells to fight an infection. The increase in white blood cells triggers your brain to heat your body up. This causes a fever.

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

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   What causes a high fever a day?

   • Sepsis: This occurs when the body has an extreme reaction to an infection. This is a daily fever that is always higher than normal but may fluctuate as much as 3.6°F (2°C) throughout the day. Common causes may include: Infective endocarditis: This is an infection of the endocardium, which is the membrane that lines the inside of the heart.

   Fever in adults: Symptoms, treatment, and when to seek help

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   Can infections cause a fever?

   • While infections most often cause fevers, there could be other underlying conditions you’ll want to get checked out. 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.

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

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   Why do you get a fever if you have a high temperature?

   • 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. A higher body temperature helps the immune system respond more vigorously to the attack, and makes it harder for these microbes to survive.

   Fever in adults: When to worry - Harvard Health

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   When do adults have a fever?

   • Adults usually have a fever when their temperature reaches 100.4 ° F. Learn the warning signs and when to get medical attention.

   Fever in adults: When to worry - Harvard Health

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8. 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 short-term...