Abstract:Tonsillectomy and adenoid tonsillectomy are one of the most common operations in otolaryngology. The postoperative pain caused by local inflammation and nerve stimulation triggered by the operation is a common complication after this type of operation, which seriously affects the postoperative quality of life and satisfaction of patients. At present, various types of analgesics (opioids, steroids, non-steroidal anti-inflammatory drugs, etc.), local anesthetic spray and local infiltration anesthesia are mainly used for postoperative analgesia.The glossopharyngeal nerve is the main nerve that innervates the tonsils and sensation around the tonsils. Therefore, blocking this nerve can achieve the purpose of analgesia. In recent years, more and more studies have been done to block glossopharyngeal nerve to relieve pain after tonsillectomy. This paper reviews the analgesic principle, blocking method and analgesic effect of this technique.