Lung cancer patients may have clavicle bulge, but it may also be caused by other diseases such as clavicle fracture and acromioclavicular arthritis. 1. The occurrence of clavicle metastasis of lung cancer, or the occurrence of supraclavicular lymph node metastasis, the formation of bone metastasis tumor or the swelling of metastatic lymph nodes can lead to the occurrence of localized bulging of clavicle, which is often accompanied by local pain and other symptoms. The clavicle metastasis can easily lead to fracture, and the enlarged metastatic lymph nodes can easily cause the surrounding tissues to be compressed, resulting in complications such as superior vena cava compression syndrome. 2. Clavicle fracture due to trauma, etc., the broken end of the dislocation, can be manifested as local soft tissue swelling, deformity and other symptoms. Dislocation of acromioclavicular joint or aseptic inflammation of the joint caused by trauma, etc., which manifests as local swelling, pain above the outer part of the shoulder and limitation of activity. Lung cancer patients with clavicle bulge are recommended to go to regular hospitals as early as possible to find out the cause of the disease and treat it actively.