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1. • • 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.
     www.msdmanuals.com/professional/infectious-diseases/biology-of-infectious-disease/fever

     Fever - Fever - MSD Manual Professional Edition

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

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   May 7, 2022 · Doctors & departments. Overview. 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.

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

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   Aug 21, 2024 · A fever is a rise in the body's temperature. Many cases of fever can be managed at home without seeing a provider. Learn when to seek medical attention.

   • Author: Colleen Doherty, MD

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

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   May 22, 2023 · Fever means a body temperature of 100.4° F (38°C) or higher. High fever in adults. While any temperature above your normal temperature range is considered a fever, there are different levels of fever severity: Low-grade: 99.1 to 100.4 F (37.3 to 38.0 C) Moderate-grade: 100.6 to 102.2 F (38.1 to 39.0 C) High-grade: 102.4 to 105.8 F (39.1 to 41 C).

   • Email: hhp_info@health.harvard.edu

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

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   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.

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

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   Apr 3, 2023 · 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.

   • Email: hhp_info@health.harvard.edu

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

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   Key Points. 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.

8. People also ask

   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 disease?

   • 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. What Is Considered a Normal Body Temperature?

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

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   What temperature is a fever?

   • There are no strict guidelines for what temperature is a fever, because body temperature varies by person, time of day and method of measurement. But healthcare providers most often say a fever temperature is 100.4 degrees F (38 degrees C) when measured orally (by mouth).

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

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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

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   How do doctors determine a fever?

   • Fever is most accurately determined by measuring rectal temperature, but oral or ear temperature is often measured. Forehead temperature is not as accurate as rectal, but doctors may measure forehead temperature to screen people for fever. Armpit temperature is the least accurate, so doctors rarely use it to confirm a fever.

   Fever in Adults - Fever in Adults - The Merck Manuals

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   Does a fever stay at a constant temperature?

   • It is lowest in the early morning and highest in the late afternoon—sometimes reaching 99.9° F (37.7° C). Similarly, a fever does not stay at a constant temperature. Sometimes temperature peaks every day and then returns to normal. This process is called intermittent fever. Alternatively, temperature varies but does not return to normal.

   Fever in Adults - Fever in Adults - The Merck Manuals

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9. www.merckmanuals.com › fever-in-adultsFever in Adults - Fever in Adults - The Merck Manuals

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   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. Elevated body temperature that is not caused by a resetting of the temperature set point is called hyperthermia.