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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 · The average body temperature is 98.6° F (37°C). But "normal" body temperature varies from person to person. It also changes during the day, rising a bit after you eat or exercise. Body temperature is often higher in the afternoon than it is when you wake up in the morning. Fever means a body temperature of 100.4° F (38°C) or higher.

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

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   May 7, 2022 · Call your child's health care provider if your child: Is listless, confused or has poor eye contact with you. Is irritable, vomits repeatedly, has a severe headache, sore throat, stomachache or other symptoms causing a lot of discomfort. Has a fever after being left in a hot car. Seek medical care immediately. Has a fever that lasts longer than ...

3. www.healthlinkbc.ca › health-topics › fever-orFever or Chills, Age 12 and Older - HealthLink BC

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   A fever is the body's normal and healthy reaction to infection and other illnesses, both minor and serious. It helps the body fight infection. A fever is a symptom, not a disease. In most cases, having a fever means that you have a minor illness. When you have a fever, your other symptoms will help you know how serious your illness is.

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

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   If your baby has a fever and is under 3 months of age, take them to the ER right away. Your baby’s immune system hasn’t developed fully yet, and they could have a serious infection. If your child has a fever along with any of the following symptoms, call 911 or go to the nearest emergency room: Extreme sluggishness or drowsiness. Lack of ...

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

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   Sep 17, 2019 · A fever that lasts longer than normal may be serious even if it is only a slight fever. This is because a recurrent fever might be a sign of a more serious infection or health condition. Common ...

6. www.webmd.com › covid › what-is-a-feverFever Symptoms & Causes: What Is Considered a Fever? - WebMD

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   Jun 20, 2024 · Hyperthermia. This is a fever over 105.8 F. It happens when your body temperature jumps so high because your body’s temperature regulator can’t handle how hot your environment is. Hyperthermia ...

7. People also ask

   Is fever dangerous in adults?

   • Fever in an adult usually isn’t usually dangerous unless it registers 103 degrees F (39.4 degrees C) or higher. If it is accompanied by any of the following symptoms, it may indicate a serious or life-threatening illness. Seek immediate medical attention if your symptoms include: Drink plenty of fluids to avoid dehydration.

   Fever — Know When to Go to the ER - Emergency physicians

   www.emergencyphysicians.org/article/know-when-to-go/fever

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   Is fever an illness?

   • Fever by itself is not an illness, but a symptom for a range of medical conditions. It also can be a side effect of some medications. Fever is one of the most common reasons that parents visit an emergency department with a child. Elevated body temperature also plays an important role in the body’s normal response to fighting infection.

   Fever — Know When to Go to the ER - Emergency physicians

   www.emergencyphysicians.org/article/know-when-to-go/fever

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   Can you get sick if you have a fever?

   • Better thermometers. We may have more accurate thermometers than people did a century ago. Despite the new research, doctors generally don’t consider you to have a fever until your temperature is at or above 100 F. But you can be sick if it’s lower than that.

   Fever Symptoms & Causes: What Is Considered a Fever? - WebMD

   www.webmd.com/covid/what-is-a-fever

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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

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

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   Should I Worry If I have a fever?

   • If you have a chronic condition or have been treated for a serious illness, let your doctor know if you have any kind of fever. A fever in adults is usually not something to worry about, but if the fever is very high or lasts for longer than 3 days, it could be the cause of a more serious illness.

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

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

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8. www.emergencyphysicians.org › feverFever — Know When to Go to the ER - Emergency physicians

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   Fever is one of the most common reasons that parents visit an emergency department with a child. Elevated body temperature also plays an important role in the body’s normal response to fighting infection. Most people consider 98.6 degrees Fahrenheit (F) (37 degrees C) a healthy body temperature, but a person’s normal body temperature may ...