After wisdom teeth extraction, the timing of brushing should be evaluated according to the trauma, and it usually takes 24 hours before brushing and rinsing. After wisdom tooth extraction, blood clot will be formed in the extraction socket firstly, which can reduce blood seepage, protect the wound and avoid infection.Within 24 hours, the blood clot adheres to the socket, and brushing or rinsing will easily lead to the dislodgement of the blood clot, which will lead to the emptiness of the extraction socket, and the easy entry of bacteria and food debris, resulting in dry socket or interstitial infections.After 24 hours, most of the blood clot has already been mechanized, and has some binding ability to the socket, so the risk of dislodgement due to brushing and rinsing will be reduced. There is a certain binding ability, the risk of its dislodgement due to brushing and rinsing is reduced, but you should also brush gently and carefully, and do not brush the extraction wound. After wisdom teeth extraction, you must carefully read the post-extraction precautions and seek help from your attending physician if you have any questions.