For parents · American Academy of Pediatrics

Child Fever: When to Call the Doctor (by Age & Temperature)

Tap your child’s age, type the temperature, and answer two quick questions. You’ll see if you should call the doctor.

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About this tool

This tool helps parents decide when a child’s fever needs a call to the doctor. Enter your child’s age, temperature, how many days the fever has lasted and any warning signs.

It follows AAP guidance: call right away for a baby younger than 3 months with a temperature of 100.4°F (38°C) or higher, a temperature that rises above 104°F (40°C) repeatedly, or warning signs such as looking very ill, a stiff neck, trouble breathing, an unexplained rash, repeated vomiting, a seizure, or immune or heart problems. Also call if the fever lasts more than 24 hours under age 2 or more than 3 days at age 2 or older.

It also explains how to care for a fever at home: fluids, light clothing and medicine for comfort.

Common questions

What temperature is a fever in a baby?

Most pediatricians consider 100.4°F (38°C) or higher a fever. A baby younger than 3 months with 100.4°F or higher should be seen by a doctor right away.

When should I worry about my child’s fever?

Call the doctor if your child looks very ill, is unusually drowsy or fussy, has a stiff neck, severe headache, trouble breathing, an unexplained rash, repeated vomiting, a seizure, or a temperature above 104°F (40°C) repeatedly.

How long can a fever last before calling the doctor?

Call if the fever lasts more than 24 hours in a child younger than 2, or more than 3 days in a child 2 or older.

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