When a woman experiences abdominal pain after menstruation, it may be caused by pelvic inflammatory disease, uterine fibroids, urinary or digestive system diseases. 1. Pelvic inflammatory disease: the symptom of abdominal pain after menstruation may be the manifestation of pelvic inflammatory disease, in addition to abdominal pain, the patient may have fever, chills and other systemic symptoms. 2. Uterine fibroids: women’s abdominal pain after menstruation may be caused by uterine fibroids, in addition to abdominal pain, the amount of menstruation may also increase, and sometimes you can touch the mass in the abdomen. 3. Urological system diseases: besides the possibility of reproductive system diseases, abdominal pain after menstruation may also be caused by urinary system diseases such as ureteral stones, kidney stones and so on. Stones in the process of discharge may lead to abdominal pain or back pain. 4. Digestive system diseases: Digestive system diseases may also cause abdominal pain, such as chronic enteritis, peptic ulcer and so on. If the symptoms of abdominal pain are not relieved after menstruation, or accompanied by other symptoms, women should go to the hospital in a timely manner, to identify the cause and give targeted treatment.