Respiratory chest pain may be caused by the following etiologies: i. Commonly, it is a disease of the respiratory system itself, such as bronchitis, pneumonia, pleural effusion, pneumothorax, bronchial dilatation and infection, tuberculosis, lung cancer, which can be clearly diagnosed by perfecting chest CT examination. Second, if it is breathing chest pain, for patients with hypertension and diabetes mellitus also need to further check electrocardiogram, cardiac ultrasound, cardiac enzymes, to exclude coronary heart disease, angina pectoris, acute myocardial infarction and other cardiovascular diseases. Third, if the patient’s chest CT and ECG are not found to be abnormal, chest pain when breathing, especially for young female patients, or patients with more emotional tension and anxiety may be caused by emotions.