Breast cancer left breast total excision lymph node turn 2 usually need radiotherapy. Breast cancer left breast total excision lymph node turn 2, indicating that the current cancer foci have lymph node metastasis, usually in the middle stage of breast cancer or advanced stage of breast cancer, due to the cancer foci are not only confined to the localization, it is often necessary to carry out the subsequent treatments, for example, radiotherapy, chemotherapy, radiotherapy is able to reduce or eliminate the foci through irradiation of the localized foci. Radiotherapy for breast cancer is usually combined with axillary lymph node dissection after mastectomy, and radiotherapy is carried out on the affected side of the chest wall, axillary lymph node area, supraclavicular lymph node area and other parts of the body, and the specific radiotherapy program and time of radiotherapy must be in accordance with the doctor’s prescription and on time.