There are several common breast diseases as follows: 1. mastocytosis: it is a kind of adult women with high incidence, related to endocrine disorders and physiological cycle, which will cause painful breast lumps, abnormal nipple overflow, etc. The symptoms will be more obvious before the onset of physiological period; 2. mastitis: it occurs mostly during lactation, mostly caused by milk stagnation, and during non-lactation period, it is mostly caused by bacterial infection, with lumps, redness and pain in the breast; 3, 3. Breast fibroids: hard lumps in the breast; 4. Benign tumors of the breast; 5. Breast cancer: the most serious breast disease, which requires mastectomy in advanced stages and has a great impact on life safety. Once the discomfort symptoms appear in the breast, you should go to the hospital breast specialist immediately.