The hole after tooth extraction is called the extraction wound, usually after tooth extraction the doctor will reset the local tissues according to the specific situation and close them appropriately, after the suture the patient needs to bite the gauze cotton roll to stop the bleeding for 30 minutes, at this time the extraction wound can gradually heal on its own and stop bleeding, but it may take about 1-3 months for the wound to completely recover to flatness. About 15 minutes after the extraction, a blood clot can be formed in the alveolar fossa and the gingival margin will shrink and involute the wound. 24 hours later, fibroblasts will extend from the alveolar bone wall into the clot and 3-4 days later, the epithelial tissue of the surrounding gingival margin will proliferate on the surface of the clot. 7 days later, the wound can be completely covered and about 30 days later, the new bone can fill the alveolar fossa and the alveolar fossa can be flattened, and about 3 months later, the new bone can be completely formed and gradually stabilized. The new bone will be completely formed and gradually stabilized in about 3 months. If the extraction wound does not heal for a long time and the alveolar socket is empty, most of them are caused by infection, so the lesion in the socket should be checked to see if there is any foreign material left, and if there is necrotic tissue, the wound should be cleared thoroughly and treated with antibiotics as prescribed by the doctor. If there is severe pain radiating to the auriculotemporal region, submandibular region or the top of the head, general pain medication cannot relieve the pain, and there is necrotic material with bad odor in the alveolar fossa, dry socket may have occurred, which is a type of acute infection. Patients are advised to seek medical attention promptly, and after thorough debridement by a professional physician, iodoform gauze strips with clove oil and rehabilitation solution are placed in the alveolar sockets to promote the growth of granulation tissue, which is replaced at the appropriate time and removed after 8-10 days.