I. Concept Mammary hyperplasia refers to the proliferation of breast epithelial and fibrous tissues, the structural degenerative lesions of the ducts and lobules of the breast tissue and the growth of progressive connective tissue. It is the most common breast disease in women. Breast proliferative diseases include simple breast hyperplasia and cystic breast hyperplasia, the former is also known as mastalgia and belongs to the range of physiological changes, while the latter belongs to pathological changes. The occurrence and development of the disease are related to the imbalance of estrogen and progesterone levels. Excess estrogen not only stimulates the proliferation of breast parenchyma, but also causes irregular proliferation of terminal ductal epithelium, resulting in ductal dilatation and cyst formation, and at the same time, because of the lack of progesterone’s inhibitory effect on estrogen, it leads to the transitional proliferation of connective tissues in the interstitium and collagenization and lymphocyte infiltration, which leads to the excessive proliferation of breast ducts and lobules in the menstrual cycle of the week and the rest of the year. Clinical manifestations may include cyclic breast swelling and pain, breast lumps, and occasional nipple discharge. Treatment 1, breast cyclic pain is usually characterized by 1-2 weeks before menstruation, the breasts began to appear swelling, falling and other feelings, with the advent of menstruation to reduce or disappear. This situation generally does not require treatment, regular observation can be. 2.If the breast pain is not relieved or lasts for a long time, which affects your life; if you can feel a lump in your breast; or if there is nipple overflow, you need to consult with a specialist for further treatment. Prevention 1. Keep your mood relaxed and stable. 2. 2, regular sleep: help balance the endocrine, so that the level of estrogen and progesterone in the body to maintain within a certain range. 3. Regulate menstruation. It is clinically found that women with disturbed menstrual cycles are more prone to breast enlargement than others, so regular menstrual cycles are one of the ways to prevent breast enlargement. 4, “low-fat high-fiber” diet. Eat more whole grains, beans and vegetables to increase the body’s metabolic pathway and reduce the adverse stimulation of the mammary glands. Control the intake of animal protein to avoid excessive estrogen. 5, supplemental vitamins, minerals. If the human body lacks B vitamins, vitamin C or calcium, magnesium and other minerals, the synthesis of prostaglandin E will be affected, and the mammary glands will be overstimulated by other hormones or aggravated hyperplasia. 6, pregnancy, breastfeeding on the mammary function is a physiological regulation, because pregnancy, breastfeeding can make the secretion of progesterone sufficient, effective protection and repair of the mammary gland; and breastfeeding can make the mammary gland fully developed, and after weaning good degradation, is not easy to appear hyperplasia. 7, try to avoid the use of drugs or health products containing estrogen, prohibit the abuse of contraceptive pills and estrogen-containing beauty products, do not eat estrogen-fed chickens, beef and so on. 8, change diet, prevent obesity. Because body fat is also one of the sources of estrogen, less fat intake can reduce the source of estrogen.