1, chest wall lesions common acute dermatitis, subcutaneous cellulitis, herpes zoster, painful obesity, myositis and dermatomyositis, epidemic myalgia, cervical spine pain, costochondritis, bone tumors, intercostal neuritis, neurogenic pain, etc. Among the common features: . The site of pain is fixed at the lesion and there is significant localized pressure pain. The pain is aggravated by deep breathing, coughing, arm raising, bending and other movements to make the thorax move. 2, lung and pleural lesions pneumonia, tuberculosis, lung abscess, pulmonary infarction, etc., due to the involvement of the lesion and the wall layer and chest pain. The common features are: mostly accompanied by coughing or coughing sputum. The chest pain is often aggravated by coughing and deep breathing, but other chest wall activities do not cause pain, and there is no local pressure pain in the chest wall. Often accompanied by signs of the primary disease, X-ray examination can be found lesions. 3.Cardiovascular system diseases Common causes of angina pectoris, myocardial infarction and pericarditis. The common features are: the pain is mostly located in the posterior sternum or precordial region, a few in the subxiphoid process, and may radiate to the left shoulder. 4.Mediastinal and esophageal lesions are less common, and the common causes are acute mediastinitis, mediastinal tumor, mediastinal emphysema, acute esophagitis, esophageal cancer, etc.. The common features are: the chest pain is located behind the sternum, with continuous progressive hidden or drilling pain, often radiating to other parts. The pain increases when swallowing and is accompanied by dysphagia. 5.Mode diaphragmatic lesions are commonly seen in diaphragmatic pleurisy, subdiaphragmatic abscess, diaphragmatic hernia, hepatitis, liver abscess, liver cancer, etc. It is characterized by the following: the pain is generally located in the thorax and lower part of the sternum. When the central part of the diaphragm is stimulated, the pain may radiate to the shoulder and neck.