Diarrhea is mainly due to the various causes of menstruation, so that the intestinal mucosa, smooth muscle stimulation, intestinal peristalsis accelerated. During menstruation, the body’s own resistance is reduced, the gastrointestinal function is also relatively low, if the diet is too cold during this period, such as often eat fruit or cold food, or do not pay attention to abdominal warmth and make the cold invade the human gastrointestinal, etc., will make the smooth muscle spasm contraction, intestinal peristalsis accelerated, and diarrhea and other symptoms. Diarrhea also has a lot to do with the woman’s own physical state, if the woman herself has a deficiency of qi and blood, yang deficiency, uterine cold and other symptoms, will also be due to the loss of qi and blood nourishment, yang lifting power is insufficient, their own cold effect, etc., and a series of uncomfortable symptoms such as diarrhea. In addition, the pelvic cavity of the uterus is congested during menstruation, which will compress the intestinal tract, thus directly accelerating intestinal peristalsis and causing the symptoms. In general, it is related to the state of their own body and external stimuli, such as cold diet or unclean diet. But women’s menstrual diarrhea is also a relatively common symptom, if the diarrhea is not very serious, it is not necessary to regulate, generally two to three days can be relieved on their own.