Painful menstrual cycle after removal of ovarian cysts may be caused by poor postoperative recovery and pelvic inflammatory disease. 1. Poor postoperative recovery: if the removal of ovarian cysts is close to the menstrual cycle, the traumatized surface of the surgery may not have recovered yet, which may lead to menstrual cramps when the traumatized area is stimulated. 2. Pelvic inflammatory disease: the pain of menstrual flow after the removal of ovarian cysts may also be due to the presence of pelvic inflammatory disease, which is often associated with premature sexual activity after surgery, poor immune system, lower abdominal distension during menstruation, and increased vaginal discharge. Ovarian cyst removal after menstrual pain may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.