Dry socket is an abnormal condition in which the pain starts to appear about 72 hours after the extraction and is more intense than after the tooth has been extracted. It is not normal because normal patients experience intense pain after extraction, but the pain gradually decreases as the inflammation subsides and after taking oral anti-inflammatory medication. However, patients with dry socket will start to experience more severe pain on the 3rd-4th day of extraction, and the pain will intensify until about 1 week, and may even radiate to the head and neck. It is necessary to visit the stomatology department in time to treat the extraction sockets, such as scraping the inflammation in the sockets under anesthesia, and putting iodoform gauze or gauze with wood distillate oil to soothe and relieve the pain.