- Infants (less than 3 months): use a digital thermometer in the baby’s rectum (bottom). Do not take the temperature in the infant’s ear.
- Babies (3 months – 2 years): use a digital thermometer in the baby’s rectum or use an electronic ear thermometer.
- Toddlers (2 – 3 years): use a digital thermometer in the child’s rectum or use an electronic ear thermometer.
- Children (3 years and up): use a digital thermometer in mouth or ear.
- Make sure to read the thermometer’s instructions. Do not use a mercury thermometer.

