Itchy throat always want to cough, common in allergic pharyngitis, reflux pharyngitis, chronic pharyngitis and so on. 1. Allergic pharyngitis: The body belongs to the allergic body, once the body comes into contact with pollen, dust mites, animal dander and other allergy-inducing substances, the body will be induced to produce an allergic reaction, which may cause an itchy throat and a cough. 2. Reflux pharyngitis: Decrease in the body’s anti-reflux function and delayed gastric emptying may lead to the reflux of gastric acid. Gastric acid can reflux to the esophagus, pharynx and other parts of the local mucous membrane caused by irritation, resulting in a tickle in the throat and always want to cough. 3. Chronic pharyngitis: repeated episodes of acute pharyngitis, a variety of nasal diseases and chronic inflammation of the respiratory tract, long-term open-mouth breathing and inflammatory secretions repeatedly stimulate the pharynx, or by the chronic tonsillitis, periodontitis under the influence of the disease can be triggered, which may also lead to the occurrence of the tickle in the throat and the old want to cough. There are other reasons that can lead to a tickle in the throat and always want to cough, it is recommended to actively seek medical attention to clarify the diagnosis.