You can run cool water over the red end to lower the reading. Some thermometers must be shaken to lower the reading. Don't bundle your baby or child up too tightly before taking the temperature. Never leave your child alone while taking his or her temperature. Be sure you use the right thermometer.
Rectal thermometers are thicker than oral thermometers.
Hold the thermometer still for 2 minutes. Never let go of the thermometer. If you're taking your child's temperature orally, place the end of the thermometer under the tongue and leave it there for 2 minutes. Don't let your child bite on the thermometer. After you're done using the thermometer, wash it in cool, soapy water.