Asthma and COPD are two kinds of diseases, but because the clinical manifestations are similar, both can be manifested as cough, sputum, shortness of breath and dyspnea, so sometimes it may not be easy to distinguish clearly. But in fact, there are also many different places, as follows: 1, the age of onset of different, because most of the chronic obstructive pulmonary and smoking, harmful gas stimulation, so the age of onset of relatively late, usually more than 40 years of age, or have a long-term history of smoking. Bronchial asthma has allergic factors, so the age of onset is younger, often with a family history, usually in adolescence, patients may also have allergic rhinitis, allergic conjunctivitis, etc.; 2, different clinical manifestations, chronic obstructive pulmonary and seasonal relationship, most patients will be in the winter and spring seasons, coughing, coughing up sputum, shortness of breath after progressive activities. Bronchial asthma patients will have shortness of breath, often with triggers, such as irritating odors inhalation, after strenuous exercise, may be triggered by bronchial asthma, episodes of wheezing and dyspnea, and other symptoms; 3, can be self-healing, once the attack of coughing, coughing sputum aggravation, wheezing aggravation, all need to be after the anti-infective, phlegm asthma treatment, only to be able to alleviate. Bronchial asthma can be self-cured, some patients may have episodes of wheezing, when out of the irritating odor environment or rest, the symptoms are not too heavy patients can be relieved. In addition, it can also be distinguished by laboratory tests, which need to be judged by the doctor in the hospital.