Pediatric Fever: When to Worry

By VeriScorePrep Team · 4 min

Fever is a symptom, not a disease — but in young infants it can signal serious bacterial infection.

Infants under 3 months

A rectal temperature of ≥38 °C (100.4 °F) warrants urgent evaluation, often including blood, urine, and cerebrospinal fluid studies. Do not give antipyretics at home before evaluation — they can mask the picture and delay diagnosis.

3 months to 3 years

Risk depends on the child's appearance, source, and height of fever. A febrile child who looks well and has a clear source can often be managed supportively and with follow-up.

Older children

Focus on the child's overall appearance. A child who is playful and drinking with a 39 °C fever may need only supportive care; a child who is lethargic, refusing fluids, or has concerning signs (petechiae, stiff neck, severe headache, persistent vomiting, difficulty breathing) needs urgent evaluation.

Antipyretics

Acetaminophen and ibuprofen (for ≥6 months) reduce discomfort and fever. Do not use aspirin in children due to Reye syndrome risk. Tepid sponging is no longer recommended — it is ineffective and uncomfortable.