Normal body temperature; Temperature - normal
Normal body temperature varies by person, age, activity, and time of day. The average normal body temperature is generally accepted as 98.6°F (37°C). Some studies suggest there is a wider range of "normal" body temperatures.
A temperature over 100.4°F (38°C) usually means you have a fever caused by an infection or illness.
Body temperature normally changes throughout the day.
Mackowiak PA. Temperature regulation and the pathogenesis of fever. In: Mandell GL, Bennett JE, Dolin R, eds. Principles and Practice of Infectious Diseases. 7th ed. Philadelphia, PA: Elsevier Churchill-Livingstone; 2009:chap 50.
Sullivan JE, Farrar HC, Section on Clinical Pharmacology and Therapeutics, Committee on Drugs. Fever and antipyretic use in children. Pediatrics. 2011;127:580–587.
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