Dry socket is a clinically specific infection that occurs more than 3 days after the extraction of wisdom teeth, when there is severe pain in the corresponding extraction wound, which is not easily relieved even by taking analgesic drugs. At this time, clinical examination will reveal that there will be obvious decay and necrotic material in the oral cavity, and there will be a strong odor in the oral cavity. For the dry socket, it is necessary to clean the extraction wound twice in time to remove the corresponding necrotic tissues, then apply iodoform gauze to fill the extraction wound, and at the same time provide anti-inflammatory and pain relief treatment for the pain symptoms.