Tooth extraction removed clinically oozing blood is bright red, scratching the alveolar fossa without granulation and other inflammatory substances, X-ray imaging performance of the alveolar bone bone without obvious changes in the alveolar bone, there is generally no inflammation present. 1. Clinical manifestations. There is no inflammation in the alveolar bone after tooth extraction, and the blood exuded is bright red, and the blood is even in texture, and there is no lumpy granulation or inflammatory material in the alveolar bone when scratching the alveolar bone with a spatula. If there is inflammation in the alveolar bone, the texture of the blood is uneven after tooth extraction, sometimes pus can be seen oozing out, and there is granulation growth in the alveolar bone after scratching. 2. X-ray image performance. After tooth extraction, X-ray film can be taken to determine whether there is inflammation of alveolar bone, if the bone in the extraction fossa is even without obvious changes, generally there is no inflammation of alveolar bone, if there is a transmissive image of the local bone in the extraction fossa, there is inflammation of alveolar bone. After the extraction of teeth should follow the doctor’s instructions for postoperative care to prevent secondary inflammation. If the pain after tooth extraction does not get better, it is recommended to go to the hospital to check whether there is local inflammation.