Airway hyperreactivity can be seen in conditions such as asthma and allergies, and is characterized by symptoms such as coughing, wheezing, and difficulty breathing. Airway usually refers to the trachea and bronchial tubes. Airway hyperresponsiveness refers to a phenomenon in which the airways show a premature and strong response to various stimuli. This symptom can be caused by cold air, dust, and specific allergens. It is mostly seen in asthma, allergies and other diseases. The response of different individuals to external stimuli varies greatly, and some of the reactions are mild, only coughing, coughing up sputum and other symptoms. There may also be obvious bronchial stenosis, manifested by severe cough, wheezing, shortness of breath, dyspnea and other symptoms. Continued aggravation of symptoms may result in impaired consciousness. It is recommended to go to the hospital in time if the above symptoms of airway hyperreactivity occur.