Should I see a doctor for a fever?
Last updated September 3, 2026.
Most fevers pass in two to three days with rest, fluids, and paracetamol or ibuprofen for comfort. MedlinePlus's adult thresholds: call a doctor at 105F (40.6C) unless it drops readily, at a fever holding or rising past 103F (39.4C), at any fever past 48 to 72 hours, or at fevers recurring for a week-plus - plus fever with a chronic condition, weakened immunity, new rash or bruises, pain peeing, or recent travel. Emergency signs: confusion, severe headache, stiff neck, breathing trouble, blue lips, or seizure. Babies under 3 months with 100.4F (38C) or higher need same-day care. Pymander is a free AI doctor, 24/7 by text, and can help you read the number, the days, and the company it keeps.
What to do
- Under 103F and improving? Ride it out: fluids, rest, comfort meds.
- Past 103F or past 3 days? Call the doctor.
- Stiff neck, confusion, or hard breathing? Emergency now.
- Baby under 3 months with 100.4F+? Same-day care, always.
Related questions
- Should I see a doctor for a cold?
- What is a normal temperature?
- Should I see a doctor for a headache?
- Should I see a doctor for a rash?