If patients often have symptoms of stuffy breath, the first thing to consider is cardiogenic factors, such as coronary artery disease, unstable angina, myocarditis, rheumatic heart disease, heart valve disease, congenital heart disease, hypertrophic obstructive cardiomyopathy, hypertensive heart disease, all these conditions can lead to ischemia, stenosis, insufficient blood supply and spasm of the coronary arteries causing symptoms of chest tightness and shortness of breath. In addition, for chronic respiratory system diseases also have frequent stuffiness, such as chronic bronchitis, chronic bronchial dilatation, chronic obstructive pulmonary disease, chronic pulmonary heart disease, and pulmonary hypertension, patients also have symptoms of chest tightness due to decreased arterial oxygen saturation, high partial pressure of carbon dioxide, and low partial pressure of oxygen. Patients with plant neurological disorders, such as cardiac neurosis, will also often have symptoms of stuffiness.