The normal body temperature of an ear thermometer is between 36.5 and 37.5°C. Generally speaking, patients with fever are considered clinically over 38°C. Generally speaking, the temperature measured with an ear thermometer is more accurate because it can indicate the core temperature of the body, which is much more accurate compared to the axillary and floor of the mouth temperatures, and is especially suitable for children and patients who are not very cooperative with the thermometer. When using an ear thermometer to measure ear temperature, the following points should be noted: First, before each measurement, the patient should be instructed not to cover the ear with his or her hands, which will lead to errors. The second point is that it is best to leave the ear temperature gun in the environment for a while, so that the temperature of the gun is similar to that of the outside world. The third point is that when the ear temperature gun is being measured, if it is an adult, try to pull the ear downward, and if it is an infant, try to pull it upward, so that the ear canal remains straight and the measurement is more accurate.