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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

   www.health.harvard.edu/diseases-and-conditions/treating-fever-in-adults

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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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   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

   www.health.harvard.edu/diseases-and-conditions/treating-fever-in-adults

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

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   May 22, 2023 · stiff neck. trouble breathing. severe pain anywhere in the body. swelling or inflammation of any part of the body. vaginal discharge that is discolored or smells bad. pain when urinating or urine that smells bad. Causes of fever. An infection, such as the flu, is the most common cause of fever. Other conditions can also cause a fever.

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3. www.mayoclinic.org › diseases-conditions › feverFever - Symptoms & causes - Mayo Clinic

   www.mayoclinic.org › diseases-conditions › fever

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

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   Sep 17, 2019 · Characteristics. Types. When it's serious. Causes. Treatments. When to go to the ER. Takeaway. You may need to get plenty of rest and drink fluids to help your body heal. But if you have a high...

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

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   Overview. What is a fever? 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.

7. www.merckmanuals.com › fever-in-adultsFever in Adults - Infections - Merck Manual Consumer Version

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   Causes |. Evaluation |. Treatment |. Essentials for Older People: Fever |. Key Points. Fever is an elevated body temperature that occurs when the body's thermostat (located in the hypothalamus in the brain) resets at a higher temperature, primarily in response to an infection.

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

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   Mar 31, 2020 · When is a fever in adults serious? When to seek help. Normal. Types and causes. Complications. COVID-19. Treatment. Prevention. Summary. Severe illness can cause extremely high temperatures...