Many women are troubled by menorrhagia. Why do they have less and less menstruation when they are so young? Often with this concern, they seek medical help everywhere, but it is difficult to get what they want. If the basic principles of menstruation formation are really clear, in fact, the treatment is not very difficult. Menstruation is based on the cyclical ovulation of the ovaries and the accompanying cyclical changes in endocrine function. This process is completed in about 28 to 30 days, i.e., a menstrual cycle is usually experienced. The cycle changes that occur in the ovaries include the follicular phase, ovulation and the luteal phase. At the same time as menstruation, the ovaries are in the early follicular phase and the recruitment of sinus follicles takes place in both ovaries, with five to ten sinus follicles being recruited in each ovary. From the time of follicle recruitment to the time of ovulation, the estrogen level in the body gradually increases, especially after the formation of the dominant follicle, reaching a peak just before ovulation, and the rising estrogen level stimulates the growth of the endometrium. After ovulation, the residual follicular cavity on the ovary forms the corpus luteum, which is capable of secreting estrogen and progesterone and reaches its functional peak one week after ovulation, after which the corpus luteum gradually atrophies and completely atrophies before menstruation, and the estrogen and progesterone levels in the body drop dramatically. While estrogen stimulates the thickening of the endometrium, it can also promote the growth of blood vessels on the endometrium, while progesterone can promote the maturation of the endometrium, that is, the change of the secretory phase, stabilize the blood vessels on the endometrium, promote the gathering and secretion of energy and nutrients on the endometrium, and provide preparation for embryonic growth. The endometrium is highly dependent on estrogen and progesterone in the body. When the hormone level suddenly decreases by half, endometrial disintegration occurs, the blood vessels rupture, and the uterus bleeds to form menstruation. Perhaps the above principles are a little difficult to understand. To summarize, the ovaries ovulate with the purpose of achieving reproductive function, and menstruation is a by-product of estrogen and progesterone changes in the ovarian cycle, and a sign of ovulatory cycle failure. The amount of menstrual flow is related to the sensitivity of the endometrium to estrogen, the density of endometrial blood vessels, the coagulation mechanism, the state of blood circulation in the uterine body, etc. If the endometrium is highly responsive to this hormone, with sufficient hyperplasia and thickening and blood vessel formation, the amount of menstrual flow is normal or excessive; on the contrary, in the absence of estrogen secretion in the body, the endometrium fails to respond to estrogen, growth is restricted, blood vessel formation is reduced, and the uterine On the contrary, in the case of insufficient estrogen production in the body, the endometrium fails to respond to estrogen, growth is limited, blood vessel formation is reduced, and the blood supply to the uterus is not sufficient, it will lead to reduced menstrual flow. Pathological factors of low menstrual flow are usually manifested as follows: decreased ovarian function, ovulation disorders, and relative reduction of estrogen secretion; abortion clearance damages the basal layer of the endometrium, resulting in poor endometrial proliferation; relative lack of estrogen receptors in the endometrium, insufficient proliferation growth or vessel formation; endometrial destruction or scar hyperplasia after removal of the contraceptive ring or endometrial inflammation; morphological changes of the uterine body, distortion and narrowing of blood supply vessels, and relative Insufficient blood supply. Chinese medicine has a profound understanding of menorrhagia and believes that menstruation is formed by the regular downward flow of liver blood through the flushing vein. When there is weakness of qi and blood, deficiency of liver blood, deficiency of kidney essence and yin; cold, stagnant qi and stagnant blood blocking the flushing vein or liver meridian, causing obstruction of the downward flow of blood; cold and stagnant blood gathering in the uterus, all these factors will lead to menorrhagia. Relatively speaking, deficiency of liver and blood, deficiency of kidney essence and yin is the more common cause, and treatment can often achieve good results by benefiting kidney essence, nourishing liver and blood, and smooth the channels of the veins, combined with the basic rules of changes of qi and blood and yin and yang in the body during the menstrual cycle. However, regulating the liver and kidneys does not work overnight and requires confidence and persistence in treatment. As for those who are basically ignorant of female physiology and pathology, they often simply try to treat menorrhagia by activating blood stasis and forcing menstruation, which can occasionally be slightly effective, but more often is ineffective or even add to the treatment, which is originally insufficient in essence and blood and further depletes the right qi, which will lead to more deficiency of essence and blood. This is the reason why some people take medicines such as motherwort cream and kunlin pills but they do not help to improve their menstrual flow. Overall, Chinese medicine treatment for menorrhagia is more targeted than western medicine hormone supplementation, and is more helpful in improving the function of the ovaries or uterus, and can better address the underlying problem.