Breast cancer may metastasize to the kidney. Breast cancer belongs to a kind of malignant tumor of breast epithelial tissue, usually through two ways: lymphatic metastasis and blood line metastasis. In the early stage of breast cancer, some small lumps can be touched in the patient’s breast, usually without pain, and a minority of patients will have paroxysmal pain and other symptoms. In the late stage of breast cancer, there is a possibility that it will metastasize to the kidneys, and symptoms such as bone pain, lumbar pain, lower limb pain and shoulder pain will appear. Distant metastasis can also reach the lungs, brain, liver and so on, which are common metastatic symptoms of malignant tumors. Therefore, once diagnosed, you should go to the regular hospital in time to improve all kinds of examinations, and there are indications for surgery. Surgical resection is the first choice, after surgery, according to the pathological stage and immunohistochemical results, chemotherapy, radiotherapy, endocrine therapy and other treatments can improve the symptoms, reduce the recurrence of metastasis and improve the cure rate.