If women usually do not have abdominal cramps but have abdominal cramps after menstruation, the following situations are mainly considered. Firstly, women with pelvic inflammatory disease causing abdominal cramping, accompanied by increased discharge or lumbago, purulent discharge from the cervix during gynecological examination, and pressure pain in the uterine body or bilateral adnexal areas. Secondly, this vaginal bleeding may not be a real menstrual period, but an abnormal bleeding due to pre-miscarriage or ectopic pregnancy. Therefore, the patient may experience abnormal pregnancy with abdominal cramping after the bleeding ends. In this case, the patient bleeds less and may have early pregnancy reactions such as nausea and vomiting, which can be further diagnosed by HCG test. Third, the patient has a luteal cyst or pelvic tumor torsion that causes abdominal cramping. Fourthly, after menstruation, the abdominal cramps are caused by urinary tract infection or intestinal diseases, and the patient may also have clinical symptoms of urinary tract or intestinal tract, such as abdominal distension, gas, constipation, diarrhea or frequent and painful urination.