I. Mastopexy (Stage I Mastopexy): The symptoms may only be pain in the breast about a week before menstruation, and the symptoms disappear after menstruation. This period is also the easiest to treat, and the time frame is shorter. Second, lobular hyperplasia (dilation of the terminal ducts of the lobules of the breast, stage II hyperplasia): the common symptom of patients is not only breast pain, compared with the pain symptoms of stage I, lobular hyperplasia breast pain cycle is not so strong, a lot of breast pain will be related to emotional changes, angry and tired can be obviously felt when the breast tingling. In addition, the pain can also radiate to the shoulders and back, causing female patients to feel soreness in the upper extremities when doing housework for a long time or working long hours with computer workers. Third, cystic hyperplasia (dilation of the breast ducts combined with epithelial hyperplasia, stage III breast hyperplasia): is the further development of the second stage of breast hyperplasia, mostly occurring in the 40 to 55 years of age. The malignancy rate of cystic hyperplasia is over 70%, which means that the chance of cancer is higher than that of benign fibroids, so women in this hyperplasia stage should pay more attention to it, and active treatment and regular checkups are very necessary. Breast cystic disease (stage IV hyperplasia): the ductal cells and epithelial cells of the breast accumulate and die, forming cystic lumps with a cancer rate of over 90%. Breast cancer (stage V hyperplasia): most breast cancer lumps are isolated single lumps with hard texture and poorly defined from surrounding tissues. The more recognized cause of breast enlargement in the medical field is endocrine disorder. A decrease in luteinizing hormone production and a relative increase in estrogen are important causes of the development of mastocytosis. The causes of mastocytosis also include mental factors. Mental stimulation can change the internal environment of the body, thus affecting the function of the endocrine system and causing abnormalities in the secretion of one or more hormones. Mental factors such as excessive tension and emotional excitement may cause the mammary gland hyperplasia that should have recovered to not recover or to recover incompletely, and over time, mammary gland hyperplasia will form. In addition, unreasonable dietary structure, such as excessive fat intake, can affect the endocrine secretion of the ovaries and strengthen the stimulation of estrogen on the epithelial cells of the mammary glands, leading to mastopexy.