If a patient has chest tightness, the following points should be considered: First, consider whether the patient has suffered from trauma, such as fractures of the sternum or ribs, contusions, lacerations and stretching injuries of the surrounding soft tissues, etc., which can lead to symptoms of chest tightness. Second, if the patient is suffering from cardiogenic diseases, it will also lead to stuffy feeling in the chest, for example, if the patient is suffering from unstable angina pectoris, myocarditis, pericarditis due to coronary heart disease, various factors triggering arrhythmia or heart failure, it will cause coronary artery ischemia, stenosis or even spasm, triggering myocardial cell hypoxia and ischemia, therefore, there will be a series of clinical manifestations such as chest tightness, shortness of breath and pain. Third, for obvious respiratory system diseases, such as pneumothorax, pleurisy, or pleural effusion, or lung infection caused by various factors, at this time, there will also be clinical symptoms of chest tightness and pain.