The difference between emphysema and asthma mainly lies in the following aspects: a. Etiology, emphysema is mostly caused by smoking and chronic bronchitis. Asthma, on the other hand, has family genetic factors and may also be caused by allergic factors. Second, the symptoms, emphysema has gradually aggravated shortness of breath symptoms, cough, cough sputum will also recur, most of the relationship with seasonal changes, and emphysema to the late stage may cause pulmonary heart disease. The main symptom of asthma is episodic dyspnea, most of which is related to the stimulation of cold air, dust, animal hair, haze, chemical irritant flavor, pollen, etc. Once these triggers are removed, dyspnea can be relieved on its own. Third, medication, emphysema patients with mild pulmonary function obstruction does not require long-term medication. The current recommendation for patients with asthma is the long-term use of inhaled glucocorticoids to reduce the number of asthma attacks and improve quality of life.