Patients with variant asthma have sputum when they cough mainly due to the characteristics of variant asthma, also known as cough variant asthma, which is a special type of bronchial asthma characterized by a long and persistent cough, especially when inhaling cold air, pollen, fumes and other allergens, or in the case of strenuous exercise or emotional excitement. In this case, the airways become significantly hyperreactive, especially with congestion, edema, and large amounts of inflammatory secretions exuding from the airways, resulting in coughing accompanied by sputum discharge, but generally the sputum is relatively thick and small in most cases. Anti-allergic treatment is usually given to avoid allergens, and in the remission phase, anti-allergic treatment is given along with immunity-boosting drugs and desensitization therapy in order to cure the disease.