You can’t eat immediately after tooth extraction, you can eat after two hours, but don’t eat too hot, too hard food, you can eat some warm, cool and soft food. Bite the cotton ball about 30 minutes after tooth extraction, the extraction socket will form a complete blood clot, the extraction wound cover, two hours later the blood clot is more stable. If you eat too soon after the extraction, the blood clot will be dislodged and cause bleeding again, and food residues will accumulate in the extraction socket, which will affect the healing of the extraction wound on the one hand, and may cause infection on the other hand. You can brush your teeth and rinse your mouth 24 hours after the extraction, but do not suck the extraction socket repeatedly. A small amount of blood in the mouth on the day of the extraction or on the 2nd day after the extraction is a normal phenomenon, if there is a large amount of bleeding, consult the doctor promptly. Extracted teeth should strictly comply with medical advice, is conducive to the healing of the extraction wound.