Generally, brushing and rinsing are not recommended within 3 days after tooth extraction because after tooth extraction, a socket will be formed where the original tooth was, and a blood clot will gradually form in the socket, which is formed to protect the wound, to prevent further bleeding and to prevent the wound from becoming infected. If you brush your teeth within 12 hours after tooth extraction, it is too early to brush your teeth, which may cause the blood clot to fall off, which may cause the area of the socket to bleed again or even bleed more than that after tooth extraction, and may cause some wound infection. It may also lead to dry socket because the socket is empty, once suffering from dry socket, the pain is very great and dry socket is more troublesome to treat.