The main clinical application of ear temperature measurement is the ear temperature gun. When measuring ear temperature, it is best to align the ear with the tympanic membrane as much as possible for a more accurate measurement. Clinically, since the patient’s ear canal is S-shaped and not straight, for adults, when measuring with an ear temperature gun, try to pull the auricle downward with your hand to ensure that the ear canal is as straight as possible, so that the gun can be aligned with the tympanic membrane as much as possible for better results. In the case of children, clinically it is better to pull the auricle upward to ensure that the ear canal is straight and that the measurement is more accurate. The first point is to try to measure the same ear each time, because the temperature of the two ears may not be the same. The second point is that before each measurement, the patient should try not to cover the ear with his or her hand, as this will cause the ear temperature to rise in a short period of time and will not represent the patient’s normal body temperature. The third point is that when the ear temperature gun is measuring, the patient should try to keep his head still, because the head shift affects the doctor’s operation of the ear temperature gun.