Forehead temperature and ear temperature are both superficial temperatures, and relatively speaking, forehead temperature is more accurate when measured because the contact area of forehead is relatively larger, but forehead temperature and ear temperature for superficial body temperature measurement are both easily disturbed by external conditions, for example, forehead temperature and ear temperature are especially susceptible to change when measured by the influence of external climate temperature. In summer, when the outdoor temperature is very high, the forehead temperature and ear temperature will be relatively high, and in winter, when the outdoor temperature is relatively low, the forehead temperature and ear temperature will be relatively low. In addition, when measuring the forehead temperature, the patient must aim at the forehead, because the forehead is relatively large when measuring the skin heat dissipation area, so the temperature difference between the back of the head and the measurement of body temperature will be 0.3-0.5 ℃. Therefore, when measuring body temperature is relatively strict, it is usually not recommended to measure the forehead and ears, but rather the axillary, anal or oral body temperature is more accurate.
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