The pain in the stomach like menstruation has two main possibilities: 1, close to ovulation or menstruation, because of the changes of estrogen and progesterone in the body will be similar to the phenomenon of menstruation, the performance of small abdominal distension, soreness and lumbar discomfort phenomenon. 2, because of chronic inflammation caused by, for example, pelvic inflammatory disease, adnexitis will also show lower abdominal pain, need to take oral treatment of gynecological inflammation drugs, such as gynecological