Coughing is a self-protective mechanism of the whistling tract, and in the case of phlegm and foreign bodies in the whistling tract, coughing encourages their expulsion. When the source of irritation of the whistle is eliminated, the coughing naturally stops. However, some people have a dry cough caused by inflammation and enlargement of the mucous membrane in the pharynx that irritates the whistle. After each cough, the airways are in a hypersensitive state, and as long as the inflammation of the pharyngeal mucosa still exists, it will continue to irritate the airways, making you cough more and more, and the more itchy you cough, you can’t stop. At this time, you can try the following 4 methods. 1, drink the right amount of water: drinking water can moisten the mouth and epiglottis, thus reducing the discomfort of dryness in the throat. 2.Speak less: The water in the mouth evaporates faster when you speak, which can easily lead to a dry and itchy throat. 3.Wear a mask when you go out: Try to wear a good mask when you go out to prevent dust, flotsam and pollen from entering the whistle and causing a cough. 4. Use cough medicine correctly: If the cough is really unbearable, you can take some cough medicine under the guidance of your doctor. However, patients with a lot of phlegm should use them with caution because the central cough suppressant effect of cough medicine may affect the discharge of phlegm.