Rice falling into a cavity after a tooth extraction can be treated by rinsing your mouth and seeking medical attention. After tooth extraction, a blood clot will form in the extraction socket. After the blood clot shrinks, it will be smaller than the extraction socket, and after eating, food debris will fall into the cavity. You can’t brush or rinse your teeth for 24 hours after tooth extraction. After 24 hours, you can remove food from the cavity by rinsing lightly. If rinsing cannot clean the food out of the cavity, you can go to a hospital dentist and have the doctor help remove it. After tooth extraction, patients are advised to try not to chew food on the extraction side, which can prevent food from embedding in the extraction socket, leading to the risk of post-extraction infection. After tooth extraction, it is important to follow the doctor’s instructions to take good care of the tooth to avoid food impaction. If you experience discomfort after tooth extraction, you should seek medical attention promptly to avoid delaying your condition.