The small amount of menstrual blood and the dark color of menstrual blood in the first two days of menstruation are caused by stagnation of qi and blood in the body and cold condensation, and also have some relationship with the usual emotions, environment, life and diet. For example, eating cold, hard food, especially chilled food and spicy, greasy, stimulating food, will lead to the body’s qi and blood operation or produce a lot of toxins and garbage, which affects the amount of menstrual blood as well as the color. Frequent depression and anxiety, insomnia, dreaming, mental tension, excessive stress, emotional discomfort will affect the operation of qi, resulting in stagnation of qi and blood stasis, affecting the normal shedding of the uterine lining, and the menstrual blood is small in volume and dark in color. Usually do not pay attention to keep warm and cold will lead to cold condensation in the body, causing meridian blockage, affecting the amount of menstruation as well as the color. Decrease in estrogen level in the body can also lead to abnormal color in the first two days of menstruation.