In humans, breathing sounds and shortness of breath are only an objective phenomenon. In fact, this phenomenon often occurs in normal people, for example, when we exercise vigorously or in moments of extreme stress, which is a normal phenomenon and cannot be called asthma at this time. The medical name for this abnormal phenomenon is asthma, and there is a more accurate definition or diagnostic criteria. This definition or diagnostic criteria has changed with advances in medical understanding, and now more emphasis is placed on having a common pathogenesis. Currently, asthma is named after the abnormal phenomenon that has common pathological features: chronic airway inflammation caused by multiple cells and cellular components, resulting in multiple manifestations such as dyspnea, increased respiratory rate, chest tightness, cough and even chest pain. Special emphasis is placed on “chronic airway inflammation”. This is because these chronic inflammatory conditions are persistent and variable. These chronic inflammations are often triggered and aggravated by irritating odors or colds or allergens or even emotions, exercise, etc., and thus symptoms appear. We diagnose this phenomenon as asthma. Of course, the specific diagnostic criteria are more complex.