It is completely normal for a woman to have a body temperature of 37.3°C before her period. Women’s body temperature will be affected by the physiological period, after ovulation, the body temperature will rise 0.3-0.5 ℃ than the original body temperature, that is to say, the original body temperature is more than 36 ℃, it is completely possible to reach 37.3 ℃. After the period is over, the body temperature will naturally drop to normal. Therefore, there is no need to be alarmed or anxious about the increase of body temperature before menstruation, it is a normal physiological phenomenon, mainly pay attention to the warmth and hygiene of menstruation. In addition, if the patient often has an elevated body temperature, or if the temperature does not drop even after the period, it is necessary to suspect the combination of other diseases, such as malignant tumors, blood diseases or tuberculosis, which can cause the body temperature to remain in a low fever for a long time, and should pay attention to the identification.