If you do not feel any severe pain or foul odor in the extraction socket about 3 days after wisdom tooth extraction, you can basically rule out the occurrence of dry socket syndrome. Dry socket is a bone trauma infection in the extraction wound, which mostly occurs about 3 days after extraction. Dry socket is mainly due to the lack of blood clot formation in the extraction wound, which leads to exposure of the alveolar bone and infection, resulting in localized osteomyelitis. Without proper treatment, the pain can gradually worsen. Patients are not advised to repeatedly suck, open their mouths wide to view the extraction socket, or even prick the extraction socket with tools such as toothpicks for fear of developing dry socket. Such behavior may cause wound bleeding, joint damage, or dislodgement of blood clots, which in turn increases the likelihood of dry socket syndrome. If there are no problems 3 days after extraction, dry socket syndrome can be largely ruled out. If 3 days after tooth extraction, the patient feels a rotten taste in the mouth, the pain in the extraction area gradually worsens and radiates to the temporal part of the ear, the top of the head and the mandibular area, or sees purulent secretion, it means that dry socket syndrome may occur, and at this time, the patient should go to the stomatology department of the regular hospital in a timely manner, and the professional doctor will deal with the wound of the tooth extraction.