Depending on the part of the body where the temperature is measured, the time needed for the measurement is also different, if the temperature is measured in the armpit, the measurement takes about 10 minutes. If the temperature is measured in the mouth, the time needed is about 5 minutes, and if the temperature is measured in the anus, the time needed is also about 5 minutes. The exact time required and the method of taking the readings can be followed according to the instructions for each thermometer, and it should be noted that temperatures in the afternoon and evening can be slightly higher than normal. Different ages, the normal value of body temperature is also slightly different, but the specific value of the difference will not be very big, usually no more than 1 ℃, if you have any doubts about measuring body temperature, you can go to the hospital in time.