Itchy dry cough without phlegm in the throat may be caused by acute pharyngitis, chronic pharyngitis, allergic pharyngitis and other reasons. 1. Acute pharyngitis: due to viral and bacterial infections that cause disease, congestion and edema in the airway, the mucous membrane in the process of damage and repair, there can be increased neural sensitivity, which causes irritating dry cough without sputum, itchy throat and other symptoms. 2. Chronic pharyngitis: chronic pharyngitis is usually caused by repeated episodes of acute pharyngitis, poor vocal habits, environmental factors such as stimulation, usually manifested as pharyngeal itching, foreign body sensation, dry cough without sputum. 3. Allergic pharyngitis: allergic reaction is induced by contact with allergens in atopic individuals, resulting in an itchy throat, irritating dry cough, and no sputum. Itchy dry cough without sputum, may also be bronchial dilatation, cough variant asthma and other causes, the patient needs to actively go to the hospital for relevant examinations, clear cause after standardized treatment.