Why do we get a fever?
The short answer
A fever is one of the body's responses to infection or illness. Raising body temperature can support immune activity and make conditions less favorable for some pathogens.
Is fever a disease?
Fever is usually a sign of a change in the body rather than a disease by itself. Infection is common, but medicines, heat illness, and inflammation can also be involved. Temperature varies with time of day and measurement site, so one number cannot identify the cause.
How should we think about it?
Rest, fluids, and watching for changes are common basic steps. Seek medical advice for a high or persistent fever, breathing trouble, confusion, or fever in a very young child. Medication and dosage depend on age and health.
Sources
This article provides general information and is not a diagnosis or a substitute for medical care.