In recent years, more and more women have been diagnosed with “breast enlargement disease”, and many of them are suffering from this problem. In fact, the vast majority of patients diagnosed with “breast enlargement” do not require treatment. Let’s take a look at the breast. The mammary gland is hormonally regulated and can change in response to changes in a woman’s biological cycle. In women of childbearing age, physiological enlargement of the breast occurs as hormone levels change in preparation for pregnancy and breastfeeding. If there is no pregnancy, the enlarged glands return to their original state under hormonal regulation. This is how the mammary glands accompany the physiological cycle of hyperplasia-rejuvenation. As a result of this change, women of childbearing age may experience mild or severe pain in one or both breasts before menstruation, which disappears on its own after menstruation, as a normal physiological phenomenon. Therefore, breast enlargement is a normal physiological process in a broad sense. In the process of hyperplasia-rejuvenation, due to the influence of certain factors (such as over-stressed work, emotional excitement, advanced age, unmarried, multiple miscarriages, non-lactation after delivery, long-term use of estrogen-containing health products, birth control pills and certain chronic endocrine diseases, etc.), poor rejuvenation may occur, manifested as: lobular hyperplasia, ductal expansion, cysts and nodule formation. These are the inaccurate names that some of our doctors often use for “mastocytosis”, which the World Health Organization (WHO) has named “mammary dysplasia”. There are three main types of breast dysplasia: a. Breast tissue hyperplasia: The main manifestation is periodic pain in the breast associated with the menstrual cycle, which is evident before menstruation and decreases or disappears after menstruation, with diffuse granular nodules palpable. Breast adenopathy: mainly manifests as breast pain associated with the menstrual cycle, appearing premenstrually and decreasing or disappearing after menstruation. The breast gland is firm or not hard on one or both sides. Cystic adenopathy: The main feature is a high degree of dilatation of the lobular ducts and terminal ducts of the breast, forming cysts. Cysts can increase in size during menstruation. Poor breast structure is extremely common. It is generally believed that simple breast hyperplasia and mammary adenopathy are not cancerous in the early stage and do not require special treatment. In contrast, middle and late stages of adenopathy and cystic disease are related to the occurrence of cancer and require regular checkups or related treatment.