Chest wall pain is partly caused by functional diseases of the chest, partly caused by damage or inflammation of the tissue structure of the chest wall, and partly caused by pulmonary, cardiac, mediastinal or upper abdominal diseases. 1. Functional diseases of the chest: such as chest wall muscle strain caused by excessive exercise, fatigue, improper posture and other factors, or autonomic dysfunction caused by emotion, anxiety, mental stress and other factors can lead to chest wall pain, but the pain will disappear by itself, and there is generally no organic change in the chest tissue structure. 2. Chest wall tissue structure is damaged or inflammation occurs: such as chest wall trauma, chest wall bone tumor or fracture, chest wall infection, costochondritis, intercostal neuritis, female breast hyperplasia, breast cysts and breast cancer, etc. Stimulation of the nociceptive nerve fibers in the tissue structure of the chest wall causes chest pain. 3. Lung diseases such as pneumonia, tuberculosis, lung cancer, pneumothorax, pleurisy, etc., heart diseases such as angina pectoris, myocardial infarction, myocarditis, pericarditis, etc., mediastinal diseases such as thymoma, mediastinitis, esophageal cancer, esophagitis, etc., upper abdominal diseases such as gastritis, gastric ulcer, pancreatitis, splenic rupture, hepatitis, cholecystitis, etc., can cause chest wall referred pain. Chest wall pain, it is recommended to go to the hospital in time for further diagnosis and treatment.