Shoulder pain caused by lung cancer is only one of the subsidiary symptoms, in fact, what is more important is that lung cancer has clinical symptoms, most of which include coughing, coughing sputum, coughing blood, elevated body temperature, progressive wasting, weakness, decreased immunity, etc., and most of them are in the advanced stage of lung cancer before shoulder pain appears. And this pain cannot be relieved by corresponding rest, even with strong painkillers such as morphine, which do not have the ability to completely relieve. In contrast, ordinary shoulder pain is only limited to shoulder joint pain and will not be accompanied by other clinical symptoms, mostly caused by exertion and strain. The pain can be significantly relieved after resting, applying heat, physical therapy or taking oral pain medications such as Fenbendazole. Although common shoulder pain belongs to strain and strain injury, and will still recur after more activities, it is not a progressive disease.