The black stuff that appears on women’s underwear needs to be distinguished whether it is caused by vaginal bleeding or abnormal vaginal discharge. If it is a woman during her menstrual period and her menstrual discharge is not smooth, there may be some abnormal bleeding with a black color. It needs to be checked by ultrasound for the endometrial condition, and can be effectively improved by taking blood-stasis-boosting drugs under the guidance of a doctor to promote the shedding of the endometrial lining. In case of abnormal vaginal discharge, it may be caused by vaginal inflammation. It is usually necessary to check whether there is vaginal inflammation through vaginal discharge examination, that is, routine examination of the white belt, and then, according to the examination results, to treat the symptoms with medication. At the same time, it is also necessary to check whether there is cervical erosion, because if it is severe cervical erosion, it is also possible to have some abnormal discharge, resulting in black stuff on the underwear.