It is normal for the body to be hot before menstruation. After ovulation, the formation of the corpus luteum will stimulate the body temperature center and cause the body temperature to rise, usually not more than 37.5℃, and this high temperature state will last for about 12 days. With the end of the luteal phase, hormone levels decline, the body temperature will return to normal, menstruation will come, such as the body temperature does not fall and accompanied by delayed menstruation, may be caused by pregnancy, the early stages of pregnancy by the influence of progesterone will also lead to increased body temperature, will exceed the normal body temperature of 0.5-1 ℃, so the woman is very fearful of heat is a normal phenomenon after pregnancy. Body heat before menstruation can be observed, if the menstrual period does not require special treatment, as long as the maintenance of menstrual hygiene can be, such as delayed menstruation, must be timely blood test, so as to avoid the existence of the phenomenon of pregnancy.