Chest pain in lung cancer is usually caused by two reasons: First, pain caused by local invasion of tumor into pleura or metastasis of pleura. Second, pain caused by chest wall metastasis, including chest wall bone metastasis and chest wall muscle metastasis, which can be clarified by chest CT examination. If the pain is mainly in the left anterior heart area, it is also necessary to be alert to exclude whether there is a combination of heart disease, such as angina pectoris and myocardial infarction. There are also very few patients with advanced tumor because of tumor depletion and low immunity of the patient, which can cause herpes zoster due to viral infection, which can also lead to chest wall pain, but this pain will be accompanied by obvious chest wall herpes.