Dry socket is a bacterial infection that occurs after tooth extraction and is most often seen as a painful condition that occurs 2-3 days after wisdom tooth extraction. The pain is more pronounced in the early stages. Dry socket is an acute infection of the extraction wound, which histologically presents as a superficial osteitis of the bone wall of the alveolar socket. It is most commonly seen in the mandibular third molar, followed by the mandibular first molar mandibular second molar. It rarely occurs in anterior teeth and is less common in other teeth. Dry socket is a bacterial infection of the bone trauma caused by a relatively traumatic tooth extraction procedure. Early symptoms are emptiness in the alveolar fossa, exposure of the alveolar bone wall, palpable bone surface on probing examination and significant sharp pain, disappearance of the blood clot, or the appearance of a decaying degenerated grayish-white blood clot with a certain foul odor. The gum tissue incision is locally red and swollen with pus. Normally, the pain in the extraction wound disappears in about three days, but in the case of dry socket, severe pain appears two days after the extraction, and the pain is radiating toward the head and neck, as well as the auriculotemporal or submandibular area, and the pain cannot be relieved by pain medication. There may be localized lymph node swelling and pain or pressure pain in the maxillofacial region. The clinical symptoms of dry socket are mainly localized pain and infection. Prophylactic antibiotic treatment after tooth extraction and intraoperative reduction of trauma can effectively avoid the occurrence of dry socket.