Mammary hyperplasia accounts for about 75% or more of all breast diseases and is the most common type of breast disease, which generally has the following three symptoms. First, breast pain. Often swelling or stabbing pain, can involve one or both breasts, with one side being more common, and the pain is so severe that it cannot be touched, even affecting daily life and work. The pain may radiate to the armpit or the back of the shoulder on the same side, and some of them may be manifested as nipple pain or itching. Breast pain often appears or worsens a few days before menstruation, and after menstruation, the pain decreases or disappears significantly, and the pain may also fluctuate with emotional changes, exertion, and weather changes. This kind of pain related to the menstrual cycle and emotional changes is the main feature of the clinical manifestation of breast hyperplasia. Second, breast lump. Lumps can occur in unilateral or bilateral breasts, single or multiple, usually occurring in the upper outer quadrant of the breast, manifested as flaky, nodular, striated of varying sizes, of which flaky is more common. The border is not obvious, the texture is medium or slightly hard, there is no adhesion with the surrounding milk, and there is often tenderness. Most of the breast lumps, also have the characteristic of changing with the menstrual cycle. Third, nipple discharge. A small number of patients may have nipple discharge, which is spontaneous, and most of them are pale yellow or pale milky white. There are also a small number of nipple overflow by squeezing the nipple can be seen overflow. Caution is needed if bloody or coffee-colored overflow occurs.