How to Use a Baby Thermometer
There are two ways to take a baby's temperature: axillary, or under the arm, and rectal, or in the anus.
- Difficulty:
- Easy
Instructions
-
Axillary
-
1
Use either a rectal or oral thermometer to take an axillary temperature.
-
2
Shake down the thermometer until it reads below 95.9 degrees, if you're using the glass-mercury type, or turn on the thermometer, if you're using the digital type.
-
3
Insert the thermometer into the armpit and hold down the baby's arm so that the end of the thermometer is completely surrounded by skin.
-
4
Leave the thermometer in place for 2 to 3 minutes if using the glass-mercury type. For the digital type, wait until the thermometer signals that the process is complete.
-
5
Read the thermometer where the line of mercury ends or, if using a digital thermometer, read the display.
Rectal
-
1
Use a rectal thermometer. Never use an oral thermometer to take a rectal temperature.
-
2
Shake down the thermometer until it reads below 95.9 degrees, if you're using the glass-mercury type, or turn on the thermometer if you're using the digital type.
-
3
Coat the end of the thermometer with petroleum jelly or another lubricant.
-
4
Insert it about 1 inch into the anus, or until the probe is completely covered.
-
5
Hold for 2 to 3 minutes or, if using a digital thermometer, wait until it signals that it is done. Try to keep the baby still.
-
6
Read the thermometer where the line of mercury ends or, if using a digital thermometer, read the display.
-
1
Tips & Warnings
Digital thermometers work faster, which may be helpful with a small baby. But glass-mercury thermometers are just as accurate and a lot less expensive.
Clean a glass-mercury thermometer with soap and water, and sterilize it by soaking it in alcohol.
Clean a digital thermometer by following the manufacturer's instructions.
For babies 6 months and younger, use the axillary method unless the doctor instructs otherwise. Putting a thermometer in the rectum may cause injury.
