There are three places your body temperature can be measured, which include the mouth, armpit, and rectal area. Axillary temperature is taken by the placement of the thermometer under the armpit. The other option would be the rectal area of a person. Axillary temperatures are at least a degree lower than what you would measure orally.
The mouth temperature is always higher when compared to the axillary temperature. Oral temperature is more accurate, and the axillary temperature is influenced by the fact that the body temperature on the outer surface of the body is being measured.