Frozen shoulder pain occurs at the beginning of the activity, the pain decreases after the activity, and there is a pain arc of 90-120° in the process of shoulder leveling, this pain is related to the movement. Lung cancer pain, like lung cancer in the apical region of the lung can also lead to pain in the back of shoulder, because lung cancer stimulates the corresponding nerves and the corresponding pain occurs, and the pain of lung cancer is longer and more intense, with no pain arc. In addition, the pain of lung cancer is mostly at night, and the effect is not very satisfactory after painkillers, but the pain of frozen shoulder can be relieved locally after exercises or hot compresses, etc., while the pain of lung cancer has no way to be relieved.