Women have different symptoms every time they get their period due to their individual physique. Some people have breast swelling and pain, some have back pain, while others will want to defecate. The main reasons are as follows: 1. It may be caused by the posterior position of the uterus. The normal position of the uterus is anteriorly inclined and forward-flexed. Posterior position of the uterus means that the cervix is upturned and tilted back to compress the intestines. Some women with a posterior uterus do not show it in their daily life, but when they have their menstruation, the posterior uterus causes menstrual pain and is accompanied by the phenomenon of bowel movement. 2. Chronic pelvic inflammatory disease may also lead to the urge to defecate when having menstrual cramps. Chronic pelvic inflammatory disease is mainly due to pelvic infection, this chronic inflammation will lead to adhesions and pelvic congestion, during the women’s menstruation pelvic congestion will be more obvious, often causing lower abdominal swelling, pain and lumbosacral soreness, which leads to dysmenorrhea always want to stool. During menstruation, you must be careful not to have intercourse or take baths, avoid contact with cold water and cold feet, and avoid eating spicy and cold foods. Pay attention to keep warm, don’t get cold and flu. Keep your mood relaxed, eliminate tension and worries, develop a good routine, don’t stay up late and have a good sleep.