Symptoms of lung cancer metastasized to clavicular lymph nodes are: swollen lymph nodes, pain, numbness and swelling of upper limbs in severe cases. 1. Enlarged lymph nodes: cancer metastasized to clavicular lymph nodes will cause enlargement of clavicular lymph nodes and formation of lumps, which are hard in texture and relatively fixed in location, and some of the lumps grow rapidly. 2. Pain: Cancer metastasized to the clavicular lymph nodes may have pain in the lymph node area, which may also be manifested as back pain. 3. Numbness and swelling of upper limbs: if the cancer metastasizes to the lymph nodes of the clavicle and forms a mass, it may lead to numbness and swelling of upper limbs if the superior vena cava or brachial plexus nerve is compressed. 4. In addition, necrosis and rupture of the mass in advanced stage of cancer may lead to infection, bleeding and other symptoms. Cancer metastasis to the clavicular lymph nodes should be treated as soon as possible, and the treatment can effectively control the metastasis of the tumor, prevent the deterioration of the condition and relieve the symptoms.