You can brush your teeth 24 hours after tooth extraction, but whether and when to brush your teeth needs to be decided under the guidance of a dentist. 1. The blood clot cannot be formed in the extraction site in a short period of time, on the one hand, brushing the teeth too soon after extraction may cause the blood clot to fall off, loose, etc., which is not conducive to the healing of the extraction wound, and is not conducive to the growth of the granulation tissue; on the other hand, it may cause secondary hemorrhage, and the infection of the extraction wound may occur. 2. 24 hours after the extraction, the blood clot is relatively stable, you can brush your teeth and rinse your mouth to keep your mouth clean, but don’t exert too much force, and don’t eat too hard or too hot food, so as not to cause the extraction socket to bleed again. In addition, a small amount of blood in the mouth on the day of extraction or the next day is normal, if there is a large amount of bleeding in time to consult the doctor. Strictly follow the doctor’s instructions after tooth extraction, on the one hand, is conducive to the healing of the extraction wound, on the other hand, can also avoid the emergence of post-extraction infection. It is recommended to consult a professional dentist before brushing your teeth.