1, breast pain: mainly seen in adolescent or young women, before the period there is obvious breast swelling, pain, sometimes the pain can extend to the back of the shoulder, often local pain and vibration pain. After menstruation, breast pain and swelling gradually relieve themselves, and there is a sense of relaxation. These patients often have dysmenorrhea, menstrual disorders and menstrual tension. In remission, there is only a sensation of breast thickening and no nodules can be found. This syndrome belongs to the range of physiological changes. 2. lobular hyperplasia: It is the most common clinical stage of breast enlargement, mostly seen in young women aged 20 to 30. The main manifestation is premenstrual breast pain and discomfort, and when the pain increases, it can extend to the back of the shoulder and the armpit. Localized nodules or lamellar tissue thickening of varying sizes can be found in the breast. After menstruation, the nodules shrink and the tissue becomes soft, but the nodules are difficult to fade completely. The lesions are more often distributed in the outer upper quadrant of the breast or are diffusely distributed. In this stage, there are obvious signs of glandular epithelial hyperplasia in the pathology. 3. Breast fibroadenoma or papillomatosis: further developed from lobular hyperplasia. The clinical manifestations are often synchronous uniform thickening of the entire breast, individual areas can be found in a clear boundary of small nodules or fibroadenoma, may be multiple small lesions, there is a certain degree of activity, but no pressure pain, and does not disappear after menstruation. At this stage, pathologically, if glandular epithelium and fibrous tissue proliferation is the main cause, then it may develop into fibroadenoma; if ductal epithelium is papillary proliferation, then it may develop into papilloma. If the skin is not intact, the skin may be damaged. It occurs mostly in women over 30 years old. The whole breast is solid, thickened, or flattened, with a smooth surface or nodular, without pressure pain. When cysts are formed, they appear as scattered, multiple nodules of different sizes in the breast. Patients often seek medical attention because of nodules in the breast; some patients may have plasma or plasma-blood nipple discharge; a few patients may also have enlarged axillary lymph nodes, or even cancer.