If patients have lymphatic metastasis of lung cancer, it usually causes aggravation of cough and blood in sputum. If patients have metastasis of supraclavicular lymph nodes, the lump on the clavicle will be painful and immovable. If there is metastasis in the mediastinal lymph nodes, it usually causes compression syndrome in the superior vena cava, with facial swelling, edema in both upper limbs, varicose veins in the chest wall, and dizziness and even fainting. If the lymph nodes on the opposite side of the lung metastasize, patients will often have cough and blood in sputum. If the lymph node of lung cancer has metastasized to the ipsilateral armpit, it will cause a mass under the armpit, and at the same time, there will be increased pain, serious swelling of upper limbs and numbness of limbs.