If you have a feeling of stool when you have your period, it may be due to the following reasons: a. Menstruation is caused by bleeding caused by the shedding of the endometrium, the endometrium sheds a certain amount of prostaglandins, due to individual differences, each person has a different degree of sensitivity to prostaglandins, some people are relatively sensitive to lower abdominal pain, and prostaglandins will not only make the smooth muscle contraction of the uterus, but also make the smooth muscle contraction of the gastrointestinal tract, so there will be a feeling of stool. It is also possible to make the smooth muscle of the gastrointestinal tract contract, so that the gastrointestinal peristalsis is strengthened, so there will be a feeling of stool. The position of the uterus is abnormal, because the uterus is in a retroflexion and retroversion position, so it will stimulate the rectum, which will cause the feeling of wanting to defecate. In this case, you can rest on the bed to reduce the stimulation of the rectum, which will also relieve the feeling of wanting to stool.