Mammary gland hyperplasia is a common and multiple diseases of women of childbearing age, which is often a superimposed onset of a variety of factors, common clinical factors are the following: 1, endocrine disorders. Luteinizing hormone secretion is reduced, the relative increase of estrogen is an important reason for the development of breast hyperplasia. Such as unsound ovarian development, menstrual irregularities, thyroid disease and liver dysfunction. 2, the influence of emotions and other mental factors. Mental tension, emotional and other adverse mental factors are prone to form breast enlargement, often late at night, lack of sleep, etc. will also cause breast enlargement, and these adverse factors will also aggravate the existing symptoms of breast enlargement. 3, man-made factors or bad habits: women of advanced age, infertility, sexual disorders, abortion, marital discord, not breastfeeding and other reasons, resulting in the mammary glands can not have normal, cyclical physiological activities. Wearing too tight bra or tight underwear and so on. 4. Unreasonable dietary structure. Such as high-fat, high-energy diet leads to excessive fat intake, drinking and smoking and other bad habits will induce breast disease. In addition, nowadays people’s diet is better, and there are many people with high blood pressure and high blood sugar, which also easily cause endocrine disorders in women and lead to breast enlargement. 5, long-term use of estrogen-containing health products, contraceptive pills. The human body long-term excessive intake of estrogen, will lead to endocrine imbalance, and now some fast food, artificial breeding of aquatic products and poultry feed also contain hormone ingredients, long-term consumption will also lead to breast disease.