Fever Decision Guide for Parents

Frequently asked questions

When is a fever too high for a child?

For babies under 3 months, any fever of 100.4°F (38°C) or higher is an emergency, go to the ER or call your pediatrician right away. For kids 3 months and older, a fever of 104°F (40°C) or higher that doesn't come down with medication, or lasts more than 3 days, warrants a call to the doctor. Fevers above 105°F (40.5°C) need immediate medical attention at any age.

When should I take my child to the ER for a fever?

Go to the ER if your child has a fever along with: trouble breathing, a stiff neck with severe headache, a rash that doesn't fade when pressed, extreme lethargy or confusion, repeated vomiting, a seizure, or a fever above 104°F that won't come down after medication. Babies under 3 months with any fever should be seen immediately.

What temperature is considered a fever for a child?

A fever is a body temperature of 100.4°F (38°C) or higher, measured rectally in babies and under the tongue or on the forehead in older kids. Temperatures between 99°F and 100.3°F are usually normal variations, not fevers.

How long should a fever last in a child?

Most viral fevers last 3 to 4 days. A fever that lasts more than 5 days, or improves and then returns, should be evaluated by a doctor. Fevers from the flu commonly last 3 to 5 days, while strep throat fevers improve within 24 hours of starting antibiotics.

How many days of fever before I should call the doctor?

Call your pediatrician if a fever lasts more than 3 days, if it's above 104°F and not responding to medication, or if your child looks unusually ill regardless of the number on the thermometer. For babies under 3 months, call immediately for any fever.

How do I reduce a fever in my child naturally at home?

Dress your child in light clothing, keep the room comfortably cool, offer plenty of fluids (water, Pedialyte, broth), and encourage rest. A lukewarm sponge bath can help, but never use cold water or rubbing alcohol. Acetaminophen (Tylenol) or ibuprofen (Motrin, Advil) for kids over 6 months can bring the fever down, always dose by weight, not age.

Is 101°F a high fever for a child?

No. For children 3 months and older, 101°F is a moderate fever and usually not dangerous on its own. It's the body fighting an infection. Focus on comfort and hydration, give fever-reducing medication if your child is uncomfortable, and watch for warning signs like lethargy or trouble breathing.

Should my child go to school with a fever?

No. Keep your child home until they've been fever-free for at least 24 hours without fever-reducing medication. Sending a child to school with a fever spreads illness and slows their recovery.