The dark color of menstrual blood may be caused by catching cold and uterine cold, you can take warming pills and other traditional Chinese medicine under the guidance of the doctor to regulate. At the same time, it is recommended to drink more brown sugar water, the abdomen can be warmed with a warm water bag, can promote the recovery of the body. The period of anxiety and anger can easily cause stagnation of Qi and blood stasis resulting in black menstrual blood, you can under the guidance of the doctor to take a reasonable Chinese medicine, such as the use of free pills to ease the liver and qi conditioning, and it is recommended that during the period of relaxation, listen to music, etc., the color of the menstrual blood to change a certain effect. Kidney deficiency can also cause changes in the color of menstrual blood, you can take six flavors of di Huang Pill under the guidance of the doctor, you can also use the He Che Da Zao Pill, and it is recommended to pay attention to strengthen the diet and nutrition, it is best to exercise properly, you can enhance the body’s resistance. The darkness of menstruation caused by low menstrual flow can take Colla Corii Asini to replenish blood, and at the same time, it is recommended to eat more pork liver, lean meat and other foods.