The correct term for the cavity should be extraction trauma, wisdom teeth extraction after extraction trauma large put iodoform gauze is generally for hemostasis or treatment of dry socket, swelling and pain relief methods for replacement of hemostatic methods or replacement of iodoform gauze, as follows. 1. Replacement of hemostatic methods: tooth extraction wound may exist in the inflammatory granulation tissue is not scraped, torn soft tissue is not sutured, fracture of the alveolar process is not reset, etc., simply filling iodoform gauze can not be completely hemostatic distension, the cause of the above bleeding to make the appropriate treatment, you can relieve the distension. 2. Replacement of iodoform gauze: If the dry socket is not thoroughly debrided during treatment or the iodoform gauze is not tightly filled, the dry socket cannot be relieved and the pain will persist, the iodoform gauze should be removed and the wound should be thoroughly debrided and then re-filled. If any of the above symptoms occur, it is recommended to go to the hospital promptly.