Black menstruation with low volume is mostly caused by ovarian dysfunction, which may be caused by stagnation of Qi and blood in Chinese medicine. Those with ovarian dysfunction need to be seen at a hospital and given different treatments according to their ovarian dysfunction. Those with long-term bleeding causing anemia should be treated with blood supplements.
During menstruation, it is necessary to pay attention to keeping the abdomen warm, taking more rest and avoiding too much activity.