If you have a cough after exercise, it is likely to be exercise-induced asthma. You need to go to the hospital for a bronchodilator test or bronchial provocation test to see if there is airway hyperreactivity. If the test result is positive, it indicates the presence of airway hyperresponsiveness. Exercise induces bronchial smooth muscle spasm, resulting in bronchoconstriction, which causes coughing symptoms and requires long-term anti-asthma treatment, in addition to not doing strenuous exercise. In general, before going to bed, it is recommended to chew one chewable tablet of montelukast sodium, which is a leukotriene inhibitor that prevents nighttime asthma attacks as well as diminishes asthma symptoms. Usually, long-term treatment with bronchodilators and glucocorticoids is still necessary, for example, adults can inhale Symbicort for a long time. For children, nebulizer inhalation of terbutaline sulfate and budesonide is recommended for treatment, both of which are more effective.