Throat scratching is also known as throat itching, in general, there are the following two clinical causes: First, chronic pharyngitis: due to the symptoms caused by chronic pharyngitis attacks, chronic pharyngitis throat itching for a longer period of time, while the patient will also be accompanied by throat dryness, itching and pain. Second, allergic laryngitis: symptoms caused by allergic laryngitis attacks. Allergic pharyngolaryngitis is a sudden onset of the situation, is due to the throat contact with allergens caused by intense itching, severe cases will also lead to breathing difficulties and swallowing difficulties, need to go to the hospital for a detailed examination of electronic laryngoscopy, blood routine, can be diagnosed. In the treatment of chronic pharyngolaryngitis, nebulized inhalation therapy is needed to eliminate the congestion and edema of the mucous membrane of the throat. Allergic laryngitis requires symptomatic anti-allergy treatment, the use of glucocorticoids, and also need to avoid allergens to gradually improve.