According to Chinese medicine diagnosis and treatment, the symptom of black menstruation with low menstrual flow is mostly blood stasis, you can take Chinese medicine soup Taohong Siwu Tang plus or minus to regulate. According to the theory of traditional Chinese medicine, if you feel cold, the blood will be condensed by cold; or if you have stagnation of qi and blood stasis (because the qi does not flow smoothly and cause blood stasis) and blockage of the cellular veins, all of them will make the blood not flow smoothly, so the menstrual flow will be low, the color is purple-black, and there are blood clots in some cases, and the abdomen is bloated and painful and refuses to be pressed, the bloating will be relieved after the blood clots are discharged, and the tongue will be normal or purplish or there will be small petechiae, and the pulse will be thin and astringent or stringy. The treatment of this syndrome is to activate blood circulation and eliminate blood stasis (promote blood circulation and eliminate blood stasis in the body) to regulate menstruation. The formula is Tao Hong Si Wu Tang plus subtractions. In Tao Hong Si Wu Tang, peach kernel, safflower and chuanxiong activate Blood circulation to eliminate stasis; angelica nourishes Blood to regulate menstruation (to regulate menstrual irregularities caused by Blood deficiency) and activates Blood to relieve pain (to relieve pain by eliminating Blood stasis); white peony softens the Liver and relieves pain (to relieve urgent pain); and ripened Chinese diabetes mellitus nourishes Blood and nourishes Yin. The whole formula has the effect of activating Blood circulation and removing Blood stasis (promoting blood circulation and eliminating Blood stasis in the body), regulating menstruation and nourishing Blood. If abdominal distension is characterized by bloating, or is accompanied by fullness in the chest and hypochondrium (a collective term for the chest and ribcage), it is due to Qi stagnation and Blood stasis (stagnation of Blood due to the lack of Qi circulation), and may be accompanied by Xiangshu and Wu Yao to regulate Qi stagnation and eliminate Blood stagnation. If you have any discomfort, you should go to the hospital as soon as possible, and the doctor should formulate an individualized treatment plan according to your specific condition, and you should not blindly use medication on your own in order to avoid delaying your condition.