Menstrual cramps and the urge to defecate are considered to be a sign of PMS. Most women experience menstrual cramps, weakness or the urge to have a bowel movement every time they have their period. This is because the estrogen level in the body changes when menstruation occurs. Prostaglandin secretion also increases, which helps the uterus to contract and stop bleeding during menstruation. The contraction of the uterus in turn affects the nearby intestines by stimulating them to produce peristalsis, which leads to a feeling of stooling and possibly nausea. Generally speaking, if there is no serious discomfort, it can be left untreated. During menstruation, you should pay attention to a healthy diet, light, rest, drink more hot water, pay attention to abdominal warmth, and prohibit sexual intercourse.