Feeling breathless and stuffy is generally a problem of cardiopulmonary function, as follows: first, respiratory problems such as asthma, chronic obstructive pulmonary disease, asthma is mostly seen in adolescent onset, usually no abnormalities, sudden onset of chest tightness and shortness of breath after smelling irritating odors, given albuterol aerosol inhalation quickly relieved, chronic obstructive pulmonary disease is mostly seen in elderly patients who have been smoking for a long time, the condition gradually aggravated, heavy in winter, light in summer. Heavy in winter, light in summer; second, cardiac insufficiency such as coronary heart disease, hypertension, heart valve prolapse or closure insufficiency, etc., mostly accompanied by lower limb edema, and the condition is usually gradually aggravated. For the identification of these two conditions can be used a simple method to identify, such as at the onset of lying aggravated, sitting alleviated for cardiac insufficiency, if not related to the position of the respiratory system diseases.