Axillary body temperature needs to be measured for at least 5 minutes. Normal methods of measuring body temperature, including axillary thermometry, oral thermometry and anal thermometry. Axillary thermometry is to dry the sweat in the armpit, shake the mercury column of the thermometer to below 35 degrees Celsius, clip the mercury end of the thermometer to the top of the armpit, clench it for at least 5 minutes, and then take out the reading. Oral temperature measurement method is to shake the thermometer, below 35 degrees Celsius, and then sterilize it, after sterilization, the mercury end of the thermometer will be clamped at the base of the tongue, and then take out the reading after 5 minutes. The anal temperature measurement method is to disinfect the thermometer and lubricate it with paraffin oil, then slowly insert the mercury end into the anus, at least one-half of it, and take out the reading after 5 minutes. The normal human body temperature range is between 36-37.3 degrees Celsius, more than 37.3 degrees Celsius is considered fever.