After tooth extraction, it is generally recommended to brush teeth and rinse mouth after 24 hours. After tooth extraction, a blood clot is usually formed within 15-30 minutes, which protects the wound from infection, and after 24 hours, the blood clot is mechanized and gradually forms granulation tissue, and the wound initially heals in about 7 days. If you brush your teeth or rinse your mouth within 24 hours, the blood clot will be easily dislodged, leaving the extraction socket empty, and food debris and bacteria may invade and cause infection. After 24 hours, the blood clot will be gradually mechanized and the risk of blood clot dislodgement will be reduced. Therefore, it is generally recommended to brush or rinse the teeth after 24 hours. However, care should be taken to be gentle and not to touch the extraction socket to avoid dislodging the blood clot. If you are concerned about oral hygiene, you can drink plenty of water and allow running water to rinse your mouth to maintain hygiene. It is recommended to follow the doctor’s advice after tooth extraction, brush teeth and rinse mouth after 24 hours, maintain good oral hygiene, do not eat too hot, too hot and spicy stimulating food, take a good rest, do not stay up late or overwork.