36.4℃ belongs to the normal body temperature range, patients do not need to worry too much. Human body temperature is relatively constant under the regulation of the hypothalamic thermoregulatory center, but due to the different measurement methods and time of measurement, the measured value of body temperature will be slightly different. In general, the armpit temperature of a normal person is 36℃-37℃, the oral temperature is 36.3℃-37.2℃, and the rectal temperature is 36.5℃-37.7℃. Although there are differences in body temperatures measured for a variety of reasons, the difference in body temperatures should not exceed 1℃ under physiological conditions. It is recommended to pay attention to daily rest, drink an appropriate amount of water, eat nutritious, easy to digest and absorb, light food. Usually pay attention to keep warm, do not get cold, appropriate increase in physical exercise, help to improve their own resistance, prevent disease.