Diarrhea during menstruation is caused by hormonal changes in the body during menstruation, as well as stimulation by cold and cold factors. During menstruation, due to pelvic congestion, it is easy to stimulate the gastrointestinal tract causing physiological diarrhea. During the menstrual period prostaglandin secretion increases, prostaglandin can act on the gastrointestinal tract, causing gastrointestinal peristalsis to accelerate, thus causing diarrhea symptoms. The symptoms of this physiological diarrhea are mild and will be relieved after the menstruation is over, so there is no need to take medication. The menstrual period is a special physiological period for women, the body’s immunity is relatively low, and it is sensitive to cold and chilly factors. If you do not pay attention to warmth during the menstrual period, especially abdominal warmth, or if you eat improperly cold and stimulating food, it can also cause diarrhea symptoms. To relieve the symptoms, it is recommended to apply hot compresses to the abdomen and take antidiarrheal medication such as montelukast if necessary.