Black discharge during menstruation is relatively normal, because menstruation contains a large amount of endometrium, endometrium and blood together, there will be black discharge, usually does not need special treatment, but need to pay attention to observe the amount of menstruation, there is no odor and other situations to avoid the occurrence of reproductive system infection. Infection of the reproductive system may lead to a change in the color of menstrual blood, or even vulvar itching and pelvic pain. Most Chinese medicine practitioners believe that the black discharge of menstrual blood is caused by uterine cold, which is also caused by insufficient qi and blood, and it is necessary to pay attention to strengthening nutritional intake, eating more jujubes, wolfberries, etc. to supplement qi and blood, and most of the symptoms can be relieved with the aging of the patient. You need to pay attention to a reasonable diet, pay more attention to rest, avoid excessive fatigue, avoid smoking and drinking.