What is a fever and what should I do if I get one? Get answers to common questions on the condition that impacts everyone from children to adults.

A fever is typically harmless and can occur when the body fights an infection, such as the flu. Persistent high fevers or additional symptoms, such as abdominal pain or difficulty breathing, may ...

A fever is common after surgery, but you should contact your doctor if it doesn't go away or gets worse. A postoperative fever over 102°F needs immediate medical attention. A fever after surgery is ...