Normal sneezing after tooth extraction has no adverse effect, but if you sneeze too hard, it may lead to wound cracking or blood clot dislodging, as follows. 1. Wound cracking: If the movement amplitude is too large when sneezing, the soft tissue pulling on the wound may lead to wound cracking, causing pain and secondary bleeding, and affecting wound healing. 2. Dislodgement of blood clot: sneezing may lead to dislodgement of blood clot, which may cause pain by exposing the nerve endings on the alveolar bone wall, and dislodgement of blood clot may also affect the healing of extraction wound, which may lead to postoperative infection or dry socket syndrome. Therefore, try to avoid sneezing hard after tooth extraction. If you experience any of the above symptoms after sneezing, it is recommended that you visit a hospital promptly for targeted treatment with the help of your doctor.