Breast overflow refers to nipple overflow, which is a clinical manifestation. There are many diseases that cause nipple overflow, such as breast hyperplasia, ductal dilatation, intraductal papilloma, breast cancer, etc. Not all of them need surgical treatment, and physicians need to decide the treatment according to the condition, among which, ductal dilatation, intraductal papilloma and breast cancer mostly need surgical treatment. 1. Breast hyperplasia: it can cause nipple overflow, and it needs to be treated with medication, such as proprietary Chinese medicines (lactofetish medicine, etc.) that can soften and disperse hard lumps, and it does not need surgical treatment. 2. Dilatation of mammary ducts: it belongs to inflammatory lesion, if it is mild, antibacterial drugs such as amoxicillin can be given to fight infection; for abscess formation, incision and drainage of abscess can be given; for recurrent cases, surgery such as lobectomy can be given. 3. Intraductal papilloma: blood overflow can occur, and it is mainly given surgical treatment in the clinic, with lumpectomy for mild cases and simple mastectomy for serious cases. 4. Breast cancer: mostly blood overflow, the treatment is mainly based on surgical treatment, according to the pathological staging and typing of breast cancer, surgical treatment will be given, and there are more surgical methods, including radical mastectomy, modified radical mastectomy, breast-conserving surgery, etc. For more details, we suggest going to the hospital. It is recommended to go to the hospital, complete all auxiliary examinations to clarify the cause of the disease, and then the professional physician will give the corresponding treatment for the condition.