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Fever In Children


A fever is an increase in your child's body temperature. Normal body temperature is 98.6°F (37°C). Fever is generally defined as greater than 100.4°F (38°C). A fever is usually a sign that your child's body is fighting an infection caused by a virus. The cause of your child's fever may not be known. A fever can be serious in young children.


Return to the emergency department if:

  • Your child's temperature reaches 105°F (40.6°C).
  • Your child has a dry mouth, cracked lips, or cries without tears.
  • Your baby has a dry diaper for at least 8 hours, or he is urinating less than usual.
  • Your child is less alert, less active, or is acting differently than he usually does.
  • Your child has a seizure or has abnormal movements of the face, arms, or legs.
  • Your child is drooling and not able to swallow.
  • Your child has a stiff neck, severe headache, confusion, or is difficult to wake.
  • Your child has a fever for longer than 5 days.
  • Your child is crying or irritable and cannot be soothed.

Contact your child's healthcare provider if:

  • Your child's rectal, ear, or forehead temperature is higher than 100.4°F (38°C).
  • Your child's oral or pacifier temperature is higher than 100°F (37.8°C).
  • Your child's armpit temperature is higher than 99°F (37.2°C).
  • Your child's fever lasts longer than 3 days.
  • You have questions or concerns about your child's fever.


  • Ibuprofen or acetaminophen can help decrease your child's fever. They are available without a doctor's order. Ask how much medicine is safe to give your child and how often to give it. Follow directions. If not taken correctly, ibuprofen can cause stomach bleeding or kidney damage, and acetaminophen can cause liver damage.
    Acetaminophen Dosage in Children
    Ibuprophen Dosage in Children
  • Do not give aspirin to children under 18 years of age. Your child could develop Reye syndrome if he takes aspirin. Reye syndrome can cause life-threatening brain and liver damage. Check your child's medicine labels for aspirin, salicylates, or oil of wintergreen.
  • Give your child's medicine as directed. Contact your child's healthcare provider if you think the medicine is not working as expected. Tell him or her if your child is allergic to any medicine. Keep a current list of the medicines, vitamins, and herbs your child takes. Include the amounts, and when, how, and why they are taken. Bring the list or the medicines in their containers to follow-up visits. Carry your child's medicine list with you in case of an emergency.

Temperature that is a fever in children:

  • A rectal, ear, or forehead temperature of 100.4°F (38°C) or higher
  • An oral or pacifier temperature of 100°F (37.8°C) or higher
  • An armpit temperature of 99°F (37.2°C) or higher

The best way to take your child's temperature:

The following are guidelines based on a child's age. Ask your child's healthcare provider about the best way to take your child's temperature.

  • If your baby is 3 months or younger , take the temperature in his armpit. If the temperature is higher than 99°F (37.2°C), take a rectal temperature. Call your baby's healthcare provider if the rectal temperature also shows your baby has a fever.
  • If your child is 3 months to 5 years , take a rectal or electronic pacifier temperature, depending on his age. After age 6 months, you can also take an ear, armpit, or forehead temperature.
  • If your child is 5 years or older , take an oral, ear, or forehead temperature.

Manage your child's fever:

  • Give your child plenty of liquids:
    • Help your child drink at least 6 to 8 eight-ounce cups of clear liquids each day. Give your child water, juice, or broth. Do not give sports drinks to babies and toddlers.
    • Ask if you should give your child an oral rehydration solution (ORS) to drink. An ORS has the right amounts of water, salts, and sugar your child needs to replace body fluids.
    • If you are breastfeeding or feeding your child formula, continue to do so. Your baby may not feel like drinking his regular amounts with each feeding. If so, feed him smaller amounts more often.
  • Dress your child in lightweight clothes. Shivers may be a sign that your child's fever is rising. Do not put extra blankets or clothes on him. This may cause his fever to rise even higher. Dress your child in light, comfortable clothing. Cover him with a lightweight blanket or sheet. Change your child's clothes, blanket, or sheets if they get wet.
  • Use a cool compress or give your child a bath in cool or lukewarm water. Your child's fever may not go down right away after his bath. Wait 30 minutes and check his temperature again. Do not put your child in a cold water or ice bath.

Follow up with your child's healthcare provider as directed:

Write down your questions so you remember to ask them during your child's visits.

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The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.