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   What happens if you have a high fever?

   • A very high fever can cause confusion, extreme sleepiness, irritability, and seizures. To help determine why you have a fever, your doctor will ask you about: recent travel, particularly travel abroad. By itself, fever is usually harmless, though a high fever can be miserable.

   Fever in adults: when to worry - Harvard Health

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

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   Can a high temperature cause a fever?

   • You may have a fever if your temperature rises above this. Adults typically have a fever if their body temperature increases to 100.4°F (38°C). This is called a low grade fever. A high grade fever happens when your body temperature is 103°F (39.4°C) or above. Most fevers usually go away by themselves after 1 to 3 days.

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

   www.healthline.com/health/cold-flu/fever-in-adults

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   How do I know if I have a fever?

   • Depending on what's causing a fever, other fever signs and symptoms may include: To take a temperature, you can choose from several types of thermometers, including oral, rectal, ear (tympanic) and forehead (temporal artery) thermometers. Oral and rectal thermometers generally provide the most accurate measurement of core body temperature.

   Fever - Symptoms & causes - Mayo Clinic

   www.mayoclinic.org/diseases-conditions/fever/symptoms-causes/syc-20352759

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

   www.mayoclinic.org › diseases-conditions › fever

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   May 7, 2022 · Depending on what's causing a fever, other fever signs and symptoms may include: Sweating; Chills and shivering; Headache; Muscle aches; Loss of appetite; Irritability; Dehydration; General weakness

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

   www.healthline.com › health › cold-flu

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   Sep 17, 2019 · Common fever symptoms in adults include: sweating; chills (shivering) headaches ; muscle pain; loss of appetite; fatigue ; weakness

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

   www.health.harvard.edu › treating-fever-in-adults

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   May 22, 2023 · 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; severe pain anywhere in the body

   • Email: hhp_info@health.harvard.edu

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

   www.verywellhealth.com › when-is-a-fever-too-high

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   Mar 7, 2024 · Symptoms. When to Act. Home Treatment. If you are an adult with a fever over 103 F (39.4 C), you need to call your healthcare provider immediately. If it is over 105 F (40.5 C), you need to rush to your nearest emergency room. You may need to act even sooner when infants, children, older adults, and immunocompromised people have a fever.

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

   www.webmd.com › first-aid › fevers-causes-symptoms

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   Nov 15, 2023 · It's usually a sign your immune system is working to fight some type of infection. Fever temperatures. Normal body temperatures are different for everyone, but they usually fall within the range...

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

   www.medicalnewstoday.com › articles › fever-in-adults

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   Mar 31, 2020 · When to seek help. Normal. Types and causes. Complications. COVID-19. Treatment. Prevention. Summary. Severe illness can cause extremely high temperatures in adults that can be life threatening....