Itchy throat may be caused by physical and chemical irritation, reflux pharyngitis, allergic pharyngitis and so on. 1. Physical and chemical stimulation: dust stimulation, inhalation of chemical gases, heavy smoking, alcoholism, neck chemotherapy and other factors may stimulate the mucosal tissues in the throat, leading to the symptoms of itching in the throat. 2. Reflux laryngitis: the reflux of stomach contents into the throat, stimulating the mucous membrane of the throat, can lead to symptoms of itching in the throat. 3. Allergic laryngitis: allergic patients will be exposed to allergens will lead to allergic reactions in the mucous membrane of the throat, which will lead to the phenomenon of itching in the throat. There are many factors that cause itching in the throat, it is recommended that patients go to the hospital in a timely manner to find out the cause of the disease under the guidance of a physician for related treatment, usually to quit smoking and drinking, eat less spicy and stimulating food, to reduce the stimulation of the throat.