Some patients who want to cough after drinking milk tea need to consider the common state of airway hyperresponsiveness due to the body’s sensitivity to milk tea as a beverage and allergic reaction, which leads to airway congestion, edema and contraction and spasm of the airway mucosal smooth muscle, which causes airway narrowing and leads to coughing. The most common clinical condition is cough variant asthma, which is a specific type of bronchial asthma with persistent, irritating cough caused by allergic factors as the main symptom. Milk tea is the allergen that causes its pathological changes. At this point, milk tea should not be drunk, and standardized anti-allergy treatment should be given, with appropriate use of immune-enhancing agents, which can lead to relief of cough symptoms.