When women experience pain in the lower abdomen after masturbation, the following causes are considered: first, masturbation without attention to hygiene causes infection, resulting in vaginitis, cervicitis or pelvic inflammatory disease caused by the patient, most often with an abnormal increase in leucorrhea, the patient has local redness and discomfort. Secondly, it is considered that the pain is caused by damage to the vulva or vagina during masturbation and may be accompanied by abnormal vaginal bleeding. Third, if the patient has endometriosis or chronic pelvic inflammatory disease masturbation, mechanical stimulation or pulling the patient’s cervix, so that the uterus will appear pulling pain. Fourth, if the patient has ectopic pregnancy, ovarian cysts or subplasma fibroids, masturbation can cause torsion of the tumor, resulting in hidden pain in the abdomen. With the occurrence of torsion and necrosis, the patient’s pain will gradually increase.