Low menstrual flow and darkness are a common occurrence for many women, and are often accompanied by abdominal cold and pain, which can be unbearable and distracting. So how can this symptom be regulated from oneself and how to change from one’s constitution? What are the causes of low and black menstrual flow? 1, endometrial damage Menstruation is accompanied by ovarian cycle changes and endometrial exfoliation and bleeding, if the uterus is stunted, such as a very small uterus or malformation, only a very small amount of endometrial shedding per physiological cycle, resulting in a small amount of menstruation. In addition, endometrial lesions caused by endometrial tuberculosis or endometrial damage caused by scraping, etc., may also result in low menstrual flow or even amenorrhea. 2, endometrial hyperplasia Estrogen can stimulate the proliferation of female endometrium, if the body’s hormone secretion is abnormal, it will lead to the proliferation of endometrium does not reach the required thickness, resulting in low menstrual flow. Excessive dieting, restlessness, emotional disorders and reproductive system diseases can affect the female endocrine environment, resulting in abnormal hormone secretion and low menstrual flow. 3.Anovulatory menstruation Anovulatory menstruation is generally characterized by a menstrual cycle of less than 21 days, no mature follicles, no luteal production, no progesterone secretion, estrogen levels increase or decrease with the growth and shrinkage of follicles, and when estrogen levels suddenly drop, withdrawal bleeding and menstruation will occur, but in this case the menstrual volume will be very small. How should I regulate the low and black menstrual volume? 1, diet must be clear talk, to ensure the smooth flow of Qi and blood, especially during menstruation can not appear constipation symptoms. You can eat more peach nuts, rape, black soybeans, which help to pass the qi and blood. It is not advisable to eat sweet potatoes, taro, fava beans, chestnuts and other foods that are easy to bloat. 2, keep a happy spirit, avoid mental stimulation and emotional fluctuations, individual in the menstrual period with lower abdominal distension, lumbar acidity, breast pain, mild diarrhea, easy fatigue, drowsiness, emotional instability, irritability or depression, etc., are normal, do not need to be overly nervous. 3, underwear should be soft, cotton, ventilation and good performance, to be diligently washed and changed, change of underwear should be put in the sun to dry. 4, the body can not be too weak during menstruation, nutrition must be sufficient, nutritional deficiencies cause Qi and blood deficiency, Qi and blood deficiency will directly affect the situation of low menstrual flow. It is necessary to eat some Chinese medicine or health supplements to replenish the qi and blood. 5, the body can not be too deficient during menstruation, nutrition must be sufficient enough, nutritional deficiencies cause Qi and blood deficiency, Qi and blood deficiency will directly affect the situation of low menstrual flow. It is necessary to eat some Chinese medicine or health supplements to replenish qi and blood, such as gum, etc. has a very good effect on women with low menstrual volume and black color. 6, during menstruation need more rest, should not touch cold water and eat cold food. 7, there are qi and blood deficiency of female friends can look at the reference material to supplement the qi deficiency blood deficiency regulating menstruation remedies.