There are many reasons for the itchy throat, such as upper respiratory tract infection, chronic pharyngitis, allergic laryngitis, etc.. 1. Upper respiratory tract infections: upper respiratory tract infections can cause itchy throat, mainly due to infectious factors, resulting in pharyngeal mucosal congestion, edema, so the early inflammation can be manifested in the throat itchy, and even accompanied by the phenomenon of throat pain. 2. Chronic pharyngitis: chronic pharyngitis needs to be considered and improper diet, long-term smoking, environmental factors, can cause congestion of the mucous membrane of the throat, so there will be an itchy throat, foreign body sensation and other phenomena. 3. Allergic pharyngolaryngitis: contact with allergens, due to allergic reactions can cause the phenomenon of itchy throat, and may even trigger the phenomenon of allergic asthma. There are many reasons for the itchy throat, after the emergence of symptoms, it is recommended to go to the hospital in a timely manner to improve the examination to clarify the diagnosis, under the guidance of the doctor to take standardized targeted treatment, not to ignore the symptoms, take it lightly.