First three monthsStrong researchWith your doctor
Know when a fever needs a doctor today
Any fever under 3 months old means a doctor the same day.
Why It Matters (Clinical Guidance)
- Young babies can get very ill very quickly.
- Also go at once for poor feeding, a weak cry or fast breathing.
- Never give aspirin. Paracetamol only by weight, on advice.
Primary Citation: IAP; NICE fever guideline
Last checked: October 2026 • Medical review panel forming