Taking your body temperature under the covers is usually not high. The theory comes from the isothermal point theory, that is, in a warm environment temperature and body temperature is equal, and wear clothes, it is not possible to wear more body temperature will become higher, wear less body temperature will become lower. The center body temperature is constant, so in the quilt temperature measurement first to sweat for adequate wiping, otherwise too much sweat caused by the thermometer to appear degree drop. In addition, the armpits and the thermometer should be in full contact with each other for at least 10 minutes in order to reflect the body’s temperature, so as not to cause hypothermia due to insufficient time.