Chest pain is actually referred to as chest pain, which can be large or small. Clinically, chest pain is mainly divided into acute chest pain and chronic chest pain. Acute chest pain is urgent and requires exclusion of major life-threatening diseases, such as acute coronary syndrome, acute aortic coarctation, acute pulmonary embolism, pneumothorax, acute abdominal disease, etc. Chronic chest pain is divided according to system: 1. circulatory system, such as angina pectoris, myocardial lesions, pericardial lesions, etc. 2. respiratory system diseases, such as pneumonia, tuberculosis, bronchiectasis, lung abscess, etc. 3. digestive system problems, such as reflux esophagitis, biliary tract problems, peptic ulcer, etc. 4. chest wall problems, such as costochondritis, costal neuritis, herpes zoster, etc., all may cause chest pain. In addition to organic problems, there is another category of functional chest pain, some menopausal women or patients with neurosis may also have drilling chest pain, but this part of patients do not have organic problems.