Dry cough and itchy throat may be caused by allergic pharyngitis, chronic pharyngitis or reflux pharyngitis. 1. Allergic pharyngitis: If you come into contact with allergy-prone substances, resulting in an allergic reaction, you will have a dry cough and itchy throat. 2. Chronic pharyngitis: repeated episodes of acute inflammation and stimulation by adverse physical and chemical factors can cause edema and hypertrophy of the mucous membrane and submucosal tissues of the pharynx, increased nerve sensitivity, and inflammatory factors can cause irritation of the throat, resulting in a dry cough and an itchy throat. 3. Reflux laryngitis: acid reflux causes irritation to the throat area, which can also lead to dry cough and itchy throat symptoms. If you have a dry cough and itchy throat, it is recommended to go to the regular hospital to do the relevant examination, to clarify what causes, and follow the doctor’s advice to adopt the appropriate treatment.