Health & symptoms
Fever by Age: Home Care, a Call, or Urgent Help?
6 min read · Updated September 2026 · Medically reviewed by Dr. Art Davis, MD
A clear age-based guide to temperatures, comfort, hydration and the warning signs parents should not wait on.
Age changes the response
A rectal temperature of 100.4°F (38°C) or higher in a baby under three months needs prompt medical evaluation. For older children, behavior, breathing and hydration often matter more than the number alone.
Comfort and fluids at home
Offer frequent fluids, light clothing and rest. Do not use aspirin in children. Ask your clinician for medicine dosing based on your child's current weight.
- Watch urine output and tears.
- Notice whether your child perks up between fever rises.
- Use a reliable digital thermometer.
Get urgent help
Seek urgent care for trouble breathing, a stiff neck, seizure, purple rash, severe dehydration, confusion, unresponsiveness or a child who looks very ill.
The takeaway
Treat the child, not only the thermometer—but fever in a baby under three months and any serious warning sign need prompt care.
This article is for educational purposes only and is not a substitute for individualized medical advice, diagnosis, or treatment. If you have concerns about your child's health, please consult your pediatrician or healthcare provider.
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