The five causes of chest tightness are as follows: 1, cardiogenic diseases, such as coronary heart disease, unstable angina, myocarditis, hypertrophic obstructive heart disease, congenital heart disease, heart valve disease, rheumatic heart disease and other factors can cause primary myocardial cell damage, which can lead to insufficient blood supply to the heart muscle and coronary artery insufficiency, in which case patients will have chest tightness, shortness of breath, palpitations and clinical symptoms. 2, respiratory diseases, such as chronic obstructive pulmonary disease, chronic pulmonary heart disease, even pulmonary hypertension, chronic bronchial dilatation, these factors can also lead to chest tightness. 2. Respiratory diseases, such as chronic obstructive pulmonary disease, chronic pulmonary heart disease, even pulmonary hypertension, chronic bronchial dilatation, these factors can also lead to chest tightness. 3. Endocrine metabolic diseases, such as thyroid dysfunction, can also occur. 4. Neurological factors in cardiac neurological disorders will also have the above-mentioned situation. 5. The patient will also have clinical manifestations of chest tightness of different degrees.