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Fever: First aid

How to take a temperature

Always use a digital thermometer to check someone's temperature. Types you can get include:

  • Rectal thermometers for use in the rectum.
  • Oral thermometers for use in the mouth.
  • Temporal artery thermometers. These use an infrared scanner to measure the temperature of the temporal artery in the forehead.
  • Armpit, called axillary, and ear, called tympanic membrane thermometers. These are less accurate.

Because of the dangers of being exposed to mercury, don't use a glass mercury thermometer.

No matter which type of thermometer you use, do the following when using it:

  • Read the instructions that came with the thermometer.
  • Clean the thermometer before and after each use with rubbing alcohol or soap and lukewarm water.
  • Don't use the same thermometer for both oral and rectal temperatures. Get two and label which is used where.
  • Never leave children alone while taking their temperature.