The presence of a sudden, incessant cough is not the result of an infectious disease, but is most likely the result of an allergic cough or cough variant asthma, often with a history of exposure to allergens. If the cough is allergic, blood tests will show elevated eosinophils and a history of allergen exposure. The first step is to get away from the allergen and treat it with an anti-allergic medication, such as loratadine or cetirizine hydrochloride. In addition, the sudden cough caused by cough variant asthma cannot be excluded, and it is necessary to check the bronchodilator test or bronchial provocation test, which is caused by airway hyperreactivity, which causes spasm of the bronchial smooth muscle, which leads to bronchoconstriction, and the sudden cough occurs. Nebulized inhaled medication is needed for relief, firstly direct inhalation of Cymbalta is recommended, often for children over ten years of age or adults. In the case of younger children, nebulized inhalation of terbutaline sulfate and budesonide is recommended for cough relief.