Cold airway hyperresponsive cough may be due to the fact that the cold itself can lead to airway hyperresponsiveness, or it may be due to the coexistence of other airway hyperresponsive diseases such as reflux esophagitis, upper airway cough syndrome, and other diseases. 1. When inflammatory cells in the airway increase as a result of a cold, the airway becomes hypersensitive to various stimuli (e.g., cold air, fumes, dust, etc.), leading to airway hyperresponsiveness, which eventually leads to coughing. 2. Reflux esophagitis: The food in the stomach or the pressure in the stomach is not balanced, causing the reflux of food, stimulating the esophagus to form reflux esophagitis. Severe reflux can cause irritation of the pharynx, which can lead to chronic pharyngitis and redness and swelling of the pharyngeal cavity, which may result in an irritating cough. 3. Upper airway cough syndrome: also known as postnasal drip syndrome, due to nasal diseases caused by secretions backflow postnasal and pharyngeal, or even backflow into the voice box or trachea, resulting in coughing symptoms. In addition, bronchial dilatation and other diseases can also lead to patients with airway hyperresponsive cough, the patient can go to the hospital to do a comprehensive examination to clarify the cause of the disease after treatment.