First Fever

What to do when your baby has their first fever.

Content reviewed against published AAP, CDC guidelines

Editorial policy

Last reviewed:

Key takeaways

  • Take temperature rectally (most accurate for babies)
  • Note the time and temperature
  • Check baby's age - under 3 months with fever = ER immediately
  • Undress baby to a single layer
  • Write down the temperature, time, and any medications given - you'll need this info when you call the doctor.
0 of 100%

Tips

  • Write down the temperature, time, and any medications given - you'll need this info when you call the doctor.
  • A fever alone is not dangerous - it means the immune system is working. How your baby ACTS matters more than the number.

Frequently asked questions

What should I do for first fever?
Take temperature rectally (most accurate for babies). Note the time and temperature. Check baby's age - under 3 months with fever = ER immediately. Undress baby to a single layer.
What is the first fever checklist?
What to do when your baby has their first fever. This checklist includes 10 key steps to help you stay prepared and organized.
Any tips for first fever?
Write down the temperature, time, and any medications given - you'll need this info when you call the doctor.. A fever alone is not dangerous - it means the immune system is working. How your baby ACTS matters more than the number..

Bottom line

What to do when your baby has their first fever. Use this checklist to stay organized and reduce stress. You can check off items as you go — your progress is saved on your device.

Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.

All content follows our editorial policy and is reviewed against published clinical guidelines.

2,705 evidence-based guides6 authoritative medical sources5 medical advisory board members