If patients have frequent chest tightness accompanied by breathlessness, the following conditions should be considered: first, cardiogenic diseases are considered, such as coronary artery disease unstable angina, or acute myocarditis, acute pericarditis, infective endocarditis, in addition, various factors that lead to arrhythmia, heart failure, there will be clinical symptoms and manifestations of chest tightness, shortness of breath, discomfort in the precordial area, breathlessness. Second, if the patient has respiratory system diseases caused by various factors, such as severe pleurisy, massive lung infection, pleural effusion, acute bronchitis, bronchial dilatation, there will also be chest tightness, shortness of breath, and breathlessness. Thirdly, if the patient has plant nerve dysfunction, especially in cardiac neurosis, he will also have the above symptoms. Fourth, endocrine diseases, often in thyroid dysfunction, adrenal dysfunction, have this clinical manifestation.