Different thermometers or different parts of the measurement, the measurement time is slightly different, commonly used thermometers have mercury thermometer and electronic thermometer, and often measured parts of the armpit, mouth and anus. Mercury thermometer to measure the armpit temperature, generally 10 minutes after the removal of readings; measurement of oral temperature, generally 5 minutes after the removal of readings, but the method can not be used for infants and young children and delirium; measurement of anal temperature, generally 5 minutes after the removal of readings. The electronic thermometer is faster, usually only about 15 seconds. Different parts of the normal value of the temperature is different, the normal value of the armpit temperature is 36.0 ℃ -37.0 ℃, the normal value of the mouth temperature is 36.3 ℃ -37.2 ℃, the normal value of the anal temperature is 36.5 ℃ -37.7 ℃. In addition, when using a mercury thermometer to measure body temperature, be careful to throw the mercury column below the scale line, and when using an electronic thermometer, check whether the power is sufficient.