Invasive breast cancer with metastasis in the axilla is generally more serious and requires axillary dissection to clarify the number of lymph node metastasis so as to carry out appropriate treatment. Invasive breast cancer suggests that the cancer lesion has broken through the basement membrane of the follicles and ducts and invaded to the surrounding tissues and organs. If there are metastases in the axilla, it often indicates that lymphatic metastasis has occurred, which is usually in the middle stage of cancer and the condition is more serious. It is recommended to go to the hospital for axillary dissection to clarify the number of lymph nodes involved; the more lymph nodes involved, the worse the prognosis. It is recommended that people who are eligible for surgery should undergo surgery in time and combine with postoperative radiotherapy and targeted therapy; if surgery is not possible, chemotherapy, radiotherapy, targeted therapy or endocrine therapy can be carried out under the guidance of doctors to control the growth of the tumor and prolong the survival time of patients.