When coughing occurs upon inhalation of cool air, there is often a condition of airway hyperresponsiveness, where stimulation by cold air leads to spasm of the bronchial smooth muscle, triggering bronchoconstriction, which results in coughing. The first step is to go to the hospital and have a bronchodilator test or bronchial excitation test performed to determine the presence of cough variant asthma. If the condition does exist, long-term treatment is required, such as chewing a chewable tablet of montelukast sodium before going to bed, which is a leukotriene inhibitor that can effectively dilate the bronchi and relieve the cough, and also prevent asthma attacks. Another drug can be long-term nebulized inhalation of Cymbalta, especially for children over ten years old or adults, with the use of inhaled Cymbalta is often more effective, the course of treatment needs to be longer. For children, long-term nebulized inhalation of terbutaline sulfate and budesonide is recommended for treatment, which is very effective in relieving the coughing phenomenon when inhaling cool air.