Fever

Also known as Pyrexia, High Temperature, Elevated Body Temperature

Fever — a temporary rise in body temperature, usually above 100.4°F (38°C) — is the body's normal immune response to infection, not an illness on its own, and a moderate fever alongside cold or flu symptoms usually doesn't need aggressive treatment in adults. Supportive care (fluids, rest) is generally enough for a low-grade fever from a common viral illness. Very high fever, fever lasting more than 3 days, fever in infants under 3 months, or fever with a stiff neck, confusion, or rash needs prompt medical care, not home management.

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