Health LibrarySymptomsFever in Adults: Home Care and When to Worry
Symptoms

Fever in Adults: Home Care and When to Worry

How long is too long, and what temperature reads red-alert.

Medically reviewed
Updated 2026

General advice

Fluids, rest, and monitoring symptoms is often enough for the first 48 hours.

Seek care if

Temperature above 39.5°C (103°F), fever lasting more than 3 days, or associated confusion, rash, breathlessness or severe pain.

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Educational content only

Milli's Health Library provides general educational information reviewed against peer-reviewed medical sources. It is not a diagnosis, prescription, or medical advice. Milli does not recommend medications. Always consult a licensed doctor before starting, stopping or changing any treatment.

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