The lungs are not innervated by painful nerves, so if there is a problem with the lungs, no pain will be felt. What we often call lung pain is actually a symptom of chest pain, and the two are easily confused. Chest pain has the following causes: 1) Chest wall diseases, including: (1) Skin and subcutaneous tissue lesions, such as acute dermatitis, subcutaneous cellulitis. (2) Peripheral neuropathy, such as intercostal neuritis, intercostal nerve tumor. (3) Muscle lesions, such as trauma and muscle ligament injury. (4) Bone and joint lesions, such as compulsory crepitus. (2) Diseases of the thoracic organs, including: (1) Heart and aortic diseases, such as coronary artery and myocardial diseases, heart valve diseases, pericardial diseases, congenital cardiovascular diseases, and aortic diseases. (2) Whistling system diseases, such as pleural diseases, tracheal and bronchial diseases, pulmonary diseases, and pulmonary artery diseases. (3) Esophageal diseases. (4) Thymic diseases. 5.Mediastinal diseases. 6.Disease of shoulder joint and its surrounding tissues. 7.Diseases of abdominal organs. There is a wide variety of diseases that cause pulmonary pain, involving almost all organs of the chest, and a few abdominal organ diseases and psychosomatic disorders can also manifest as chest pain.