Fever A fever is an abnormally high body temperature. Fever may occur for many reasons.
Fever is measured using a thermometer.
Children should be given acetaminophen or ibuprofen instead of aspirin, because of the risk of Reye's Syndrome. Heat is lost through the skin, so do not bundle up under blankets. A cool shower or bath may help. Take particular care when dealing with a temperature in an infant or small child. Contact a healthcare provider for any temperature elevation in an infant 3 months of age or younger.