Breast cancer patients usually have no symptoms on their hands, but if there is an enlarged axillary lymph node, it may affect the blood circulation of the upper extremity on one side of the breast cancer, and then it may cause swelling of the hand or even the whole upper extremity, at this time, the clinical stage of breast cancer should not be in the early stage, and it is often not recommended to perform surgical excision first, and a puncture biopsy of the breast mass or the enlarged axillary lymph node is needed to clarify After the diagnosis of breast cancer is made, preoperative chemotherapy is needed first. After surgery, chemotherapy and radiotherapy are required, and in some cases, oral endocrine drugs are also required depending on the immunohistochemistry.