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Illness & Conditions - Definition

Fever

Fever

Fever is the body's normal response to infection and other conditions, both minor and serious. Most fevers help the body fight infection.

The average normal body temperature is 98.6°F (37°C) orally. It can change during the day from a low of 97.4°F (36.3°C) in the morning to a high of 99.6°F (37.6°C) in the late afternoon. Mild elevations—(99.8°F (37.7°C)— can be caused by too much clothing, a hot bath, or hot weather.

Fever in a child is present when a child's temperature is 100.4°F (38°C) or higher measured rectally.

Current as of: June 4, 2014

Author: Healthwise Staff

Medical Review: William H. Blahd, Jr., MD, FACEP - Emergency Medicine & H. Michael O'Connor, MD - Emergency Medicine

This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.

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