Itchy throat and dry cough may be a symptom of certain diseases, such as allergic laryngitis, upper respiratory tract infections, bronchitis and so on. 1. Allergic pharyngolaryngitis: after contacting allergens by inhalation or eating, allergic phenomenon will easily occur, accompanied by lymphoid follicular hyperplasia, which may result in itchy throat and dry cough. 2. Upper respiratory tract infection: commonly caused by bacterial or viral infections, easily stimulate the mucous membrane of the throat congestion, edema, may have itching, dry cough symptoms, usually about a week can be relieved. 3. Bronchitis: common in bacterial infection, acute phase easily stimulate the bronchial tubes or lungs, hyperreactivity, causing cough, early dry cough, itchy feeling. In short, it is recommended to consult a doctor in time for clear diagnosis and treatment of throat discomfort.