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

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   May 22, 2023 · 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). When to worry about fever. If you have a fever over 104°F (40°C), you should call your doctor. Seek medical help right away if you have a fever along with any of these symptoms: seizure; loss of consciousness; confusion; stiff neck; trouble breathing

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2. www.verywellhealth.com › when-is-a-fever-too-highWhat Causes a High-Grade Fever and When Is It Too High?

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   Mar 7, 2024 · A fever is considered high when the temperature is above 103 F in adults. In young children and others, a high fever may be defined differently.

3. www.healthline.com › health › hyperpyrexiaHyperpyrexia: Definition, Symptoms, Causes, and Treatment

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   May 4, 2018 · Symptoms of hyperpyrexia. In addition to a fever of 106°F (41.1°C) or higher, symptoms of hyperpyrexia can include: increased or irregular heart rate. muscle spasms. rapid breathing. seizures....

4. www.webmd.com › a-to-z-guides › what-is-hyperpyrexiaWhat is Hyperpyrexia? What are its causes, symptoms, and ...

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   Jul 7, 2023 · Hyperpyrexia — or very high fever — is a life-threatening emergency that needs immediate medical attention. Find out what it is, what causes it, and how it can be diagnosed and treated.

5. www.healthpages.org › health-a-z › fever-adults100, 101 or 102 Degree Fever? Adult Guide to High Temperatures

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   Aug 4, 2024 · Here's what you need to know about fever in adults: What the possible causes are, temperature ranges and when to be concerned, how to make sure the temperature reading is accurate, when you need to see a doctor, stages of fever and how to treat a fever.

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

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   Sep 17, 2019 · Call your doctor immediately if you have a high grade fever — when your temperature is 103°F (39.4°C) or higher. Get medical help if you have any kind of fever for more than three days.

7. People also ask

   What is a high fever called?

   • So, a very high fever is called hyperpyrexia. Hyperpyrexia is a condition where the body temperature goes above 106.7 degrees Fahrenheit (41.5 degrees Celsius) due to changes in the hypothalamus — the organ in the brain that regulates temperature. Hyperpyrexia is a life-threatening emergency that demands urgent medical attention.

   What is Hyperpyrexia? What are its causes, symptoms, and ... - WebMD

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   What temperature is considered a high-grade fever?

   • A body temperature that exceeds the baseline body temperature of 98.6°F is considered a fever. Most fevers do not go beyond 103°F or 104°F (39.4°C or 40°C), but if the mercury levels reach 105°F or 106°F, it is regarded as very high-grade fever. If the body temperature crosses over 106°F, it is in a state of severely high fever called hyperpyrexia.

   Fever: Stages, Causes, Symptoms, and Medical Treatment - eMediHealth

   www.emedihealth.com/respiratory-health/cough-cold-flu/fever-causes

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   Is fever a medical condition?

   • Fever by itself does not qualify as a medical condition, but it is symptomatic of other diseases. A rise in body temperature is one of the body’s standard defense mechanism against anything it perceives as a health threat, be it illnesses, infections, malignancies, or trauma. But it occurs most typically during a self-resolving viral infection.

   Fever: Stages, Causes, Symptoms, and Medical Treatment - eMediHealth

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   What causes a high fever?

   • A high fever can also be caused by drug reactions, inflammatory diseases, autoimmune disorders, excess heat exposure, and other non-infectious conditions. These conditions cause fever by disrupting the part of the brain that functions as the body's thermostat, called the hypothalamus.

   What Causes a High-Grade Fever and When Is It Too High? - Verywell H…

   www.verywellhealth.com/when-is-a-fever-too-high-770347

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   What is the difference between moderate and high-grade fever?

   • Moderate-grade fever is defined as an oral temperature of 100.6 to 102.2 F (38.1 to 39.0 C) in adults. High-grade fever is defined as an oral temperature of 102.4 to 105.8 F (39.1 to 41 C) in adults. It can cause all of the above, plus: Hyperpyrexia is the term for an exceptionally high fever over 106.7 F (41.5 C).

   What Causes a High-Grade Fever and When Is It Too High? - Verywell H…

   www.verywellhealth.com/when-is-a-fever-too-high-770347

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8. www.emedihealth.com › cough-cold-flu › fever-causesFever: Stages, Causes, Symptoms, and Medical Treatment

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   Aug 11, 2021 · Most fevers do not go beyond 103°F or 104°F (39.4°C or 40°C), but if the mercury levels reach 105°F or 106°F, it is regarded as very high-grade fever. If the body temperature crosses over 106°F, it is in a state of severely high fever called hyperpyrexia. Hyperpyrexia can be regarded as a complication and requires prompt medical attention.