Cough variant asthma is a specific type of asthma in which chronic cough is the main or only clinical manifestation. In the early stages of asthma, about 5-6% have a persistent cough, mostly at night or in the early hours of the morning, often irritating, which is often misdiagnosed as bronchitis. cough variant asthma is clearly recognized as a form of asthma in GINA, and its pathophysiological changes are the same as those of asthma, with a persistent airway inflammatory response and airway hyperresponsiveness. So how do we carry out preventive and control measures for cough variant asthma? 1. Actively look for allergens. Commonly, these are inhalation of certain plant pollen, house dust, mites, fungal spores, animal dander, fish and shrimp in food or contact with paint dyes. It is important to carefully observe what factors exist before each coughing episode, find out the allergenic factors, and avoid them to prevent re-exposure. 2. Avoid triggers. There are three possible triggers for cough variant asthma attacks: first, climate change, with winter and spring being the high incidence periods and cold air stimulation being the main trigger, so make sure you keep warm and protect yourself, especially in winter when you go out early in the morning to wear a mild and wear a mask; second, cough aggravation after exercise, so avoid strenuous exercise with this type of asthma; third, emotional excitement can also trigger a cough attack, so try to keep your emotions stable. 3. Enhance the immune function of the body. Cough variant asthma is essentially asthma, and asthma is a metabolic disease, that is, a metabolic reaction caused by abnormal immune function, so we should focus on improving and enhancing the body’s immune function. 4.Control the attack. The treatment of cough variant asthma attack can be treated according to the common asthma method.