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How to Take a Rectal Temperature

Medically reviewed by: Melanie L. Pitone, MD

How Do I Take a Rectal Temperature?

The best way to take a temperature in infants and young children is by taking a rectal temperature. Don't worry — it's a simple and safe process.

First:

  • If your baby has had a bath or has been under blankets or in multiple layers (or swaddled, if an infant), wait about 20–30 minutes to take the temperature. 
  • Use a digital thermometer. Don’t use a glass thermometer, as these aren’t safe.