Dry socket is a localized infection of the extraction wound caused by oral bacteria, most often after mandibular third molar extraction. It is mainly caused by infection, trauma, and large extraction sockets. Its main symptom manifests as severe scattered pain that occurs 2-3 days after tooth extraction and lasts for tens of days, which cannot be relieved by taking analgesic and anti-inflammatory drugs. Some patients may also show obvious oral odor, purulent secretion discharge, palpable lymph node enlargement, pain, restriction of mouth opening, etc. If not treated in time, aggravation of infection will cause osteomyelitis of the jaw, but most of the dry socket can be self-healing. Most of the dry socket can be cured on its own. Clinically, local anesthesia is often used to clean up the wound, and oral anti-infective drugs are used to treat the disease. The specific situation depends on the condition of the treatment plan. After taking effective treatment plan, usually 1 to 3 days after the obvious improvement, the trauma scattered pain has been relieved, oral odor reduction, and observed that the fossa bone wall of the new granulation tissue covering the trauma, the alveolar cavity gradually healing. In order to avoid the occurrence of dry socket, in addition to minimizing trauma during surgery, the patients themselves should do not brush and rinse their teeth for 24 hours after surgery, maintain oral hygiene for 24 hours, avoid carbonated and alcoholic beverages, avoid postoperative smoking, and should follow the doctor’s instructions, trauma greater inclusion to give the necessary antimicrobial medication.