Aunt is black. What's going on?

If you are on the first day of menstruation or at the end of menstruation, there is a small amount of black blood, which may be caused by staying in the uterus and vagina for a long time. In the case of slow menstrual flow, blood cells are destroyed, thus forming black blood. Some people may belong to disease factors, such as endometriosis, pelvic inflammatory disease and other gynecological inflammation. If only the color of menstruation is black, and there are no other abnormal manifestations, you can continue to observe. If the menstrual color is black, lasts for a long time or bleeds more, it is necessary to go to a regular hospital for further examination, understand the specific causes, and follow the doctor's advice to use symptomatic drugs to treat.