Uterine distension is a common self-conscious symptom in women, the causes of the symptoms: 1, the uterine distension that occurs during menstruation and before menstruation, are related to the poor elimination of menstrual blood. It may be due to the invasion of cold before or during menstruation, cold blood stagnation, so that the menstrual blood stagnation caused by obstruction of the uterine distension. Uterine distension may also be caused by narrowing of the cervix and endometrial adhesions, which affect the discharge of menstrual blood during menstruation. Endometriosis that occurs in the myometrium will be accompanied by the onset of menstruation and obvious uterine distension.2. Uterine distension that is not directly related to the menstrual period often occurs in endometritis, pelvic inflammatory disease, uterine fibroids and other diseases, and the patient may also have abnormal leukorrhea, fever, loss of appetite, abnormal bleeding in the vagina and other clinical symptoms.