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Condition

Fever of Unknown Origin

A fever that lasts three weeks or longer without a clear cause after initial testing.

Also called: unexplained fever, persistent fever

General information, not medical advice. Ask a provider about fever of unknown origin and what is right for you.

Medical Disclaimer

The information on this site is for general educational purposes only and is not medical advice, diagnosis, or treatment. Reading this site does not create a doctor–patient relationship. Always consult a qualified healthcare professional for personal guidance. If this is an emergency, call 911. Mentions of medications, devices, or procedures are informational and not endorsements. Full medical disclaimer.