A positive bronchial provocation test indicates the presence of airway hyperresponsiveness, suggesting the possibility of diseases such as bronchial asthma. Bronchial provocation test is to check the sensitivity of the airways to contraction caused by external stimuli, and there are two kinds of results: negative means normal, and positive indicates the existence of airway hyperreactivity, suggesting that there may be bronchial asthma, wheezing bronchitis, pharyngitis, allergic rhinitis, chronic bronchitis, allergic alveolitis and other respiratory diseases. However, only one positive bronchial provocation test is generally not enough to confirm the diagnosis of related diseases, but also need to be combined with other tests to confirm the diagnosis, the bronchial provocation test has a certain degree of risk, so must follow the doctor’s instructions to carry out, and actively cooperate with the physician’s operation, the basal ventilation function of the serious impairment of the person can not be carried out bronchial provocation test.