A dry cough from time to time is a condition that requires consideration of chronic inflammation of the airways. Dry cough is a condition in which there are fewer secretions in the airways, which can be accompanied by congestion and edema of the airway mucosa, and may even be accompanied by varying degrees of contraction of the airway smooth muscle. Generally due to the invasion of allergens, such as cold air, pollen, fumes or eating nuts, high protein diets, including milk, soy milk, eggs, etc., this time will enhance these above pathological reactions, forming a state of hyper-reactive airway inflammatory response, with a transient intermittent dry cough.