Breathing chest pain may be caused by the following diseases: 1, respiratory system diseases, such as acute pneumonia, emphysema, fibro-cavernous tuberculosis, etc., because respiratory diseases may cause pathological damage to the lungs or respiratory organ tissues, thus causing symptoms of chest pain. 2, cardiovascular diseases, such as cardiogenic pulmonary heart disease, rheumatic heart disease, viral myocarditis, etc., after lesions in the cardiovascular system The symptoms of chest pain and tightness and respiratory distress can be caused by insufficient oxygen supply to the heart muscle. 4. Inflammatory diseases of the chest cavity, such as reactive pleurisy, pleural cancer, pleural fibroma, etc., because the local peripheral nerves are stimulated by the disease after the lesion of the pleural tissues, thus causing the symptoms of chest pain in breathing.