When measuring body temperature with a forehead thermometer, the temperature of the forehead is slightly higher than that of the center of the forehead because of the passage of the temporal artery and the relatively rich circulation of blood in the local skin. Therefore, to determine the existence of fever, the body temperature in the center of the forehead is often used as a standard. If the body temperature in the center of the forehead is within the normal range, and only the temperature on both sides of the forehead increases, it does not mean that the patient has fever. In this case, you can have the temperature of the axilla measured to determine whether the patient has a fever by using the axillary temperature standard.