Oral thermometer can be used in the armpit, but note that the oral thermometer needs to be sterilized before placing it in the armpit, pay attention to the temperature around the armpit, including objects that affect body temperature, such as baby warmers, ice packs or hot water packs, etc. If there is sweat you should wipe the sweat clean. Each thermometer has different measurement methods and different body temperatures, for example, axillary temperature measurement, the normal value is usually 36-37℃, while the normal value of oral temperature is 36.3-37.2℃ and the normal value of anal temperature is 36.5-37.7℃. Pay attention to the elderly and infants, especially comatose elderly must not be able to use oral thermometer, easily caused by biting or accidental inhalation, resulting in poisoning or foreign body inhalation.