Once lung cancer metastasis in axillary lymph nodes is relatively rare, once lung cancer metastasis in axillary lymph nodes is stage III lung cancer, it often manifests as axillary lumps or lymph node enlargement, and lung cancer cells can be found by puncture biopsy for lumps or lymph node enlargement. Once lung cancer metastases in the axillary lymph nodes are stage III, surgery is not the first choice, but usually through simultaneous radiotherapy and chemotherapy to solve the pain and prolong life. If targeted therapeutic drugs are available, targeted drugs can be used at this time, especially for non-small cell lung cancer with EGFR gene mutation or ALK gene mutation. Once small cell lung cancer metastases in the axillary lymph nodes, the main treatment is chemotherapy.