Breast cancer grade II is a pathological grade, which is not completely certain, but it may be early in the middle stage, and the size of the tumor and whether there is infiltration of surrounding tissues and lymph node metastasis should be taken into account to determine the stage. The early symptoms of breast cancer are mainly painless breast lumps, usually no other pain or special systemic manifestations, of course, some may have nipple overflow and skin changes on the surface of the breast, which may be graded above grade 4 by ultrasound. After diagnosis, breast cancer is mainly treated by surgery, including mastectomy and axillary lymph node dissection, followed by radiotherapy, chemotherapy, endocrine therapy and targeted drugs. Breast cancer is also a systemic disease that requires comprehensive treatment. If breast cancer is not detected and treated as a benign breast lump, it may recur or metastasize within a short period of time, and the treatment effect will not be good.