The most predominant diseases that clinically cause expiratory dyspnea are chronic obstructive pulmonary disease and bronchial asthma. If the patient has expiratory dyspnea because of bronchial asthma, oral montelukast sodium, inhaled budesonide formoterol, and during the acute exacerbation of the disease, rapid-acting salbutamol ipratropium can be inhaled to quickly quell asthma. If the patient has expiratory dyspnea because of chronic obstructive pulmonary disease, quit smoking, take rest, and avoid exposure to cold during the stabilization period. If the patient develops cough, cough suppressant drugs can be given. If the patient develops phlegm that cannot be coughed up, expectorant drugs can be used. When the patient develops obvious asthma symptoms, bronchodilators can be inhaled for the purpose of calming asthma.