You should not eat or drink for 2 hours after tooth extraction, after that you can eat warm and cool or liquid food. Extraction is a routine treatment program of oral and maxillofacial surgery, its main indications are wisdom teeth, retained milk teeth, stumps, supernumerary teeth or ambulatory teeth, etc.; because extraction is a traumatic treatment, the postoperative wounds are often accompanied by bleeding, pain or infection and other symptoms. Therefore, you should follow the doctor’s instruction to eat water after 2 hours to prevent the blood clot from falling off and the wound from bleeding and infection, etc. Generally, it is recommended to have a liquid diet (such as noodles, congee or bread, etc.) within three days after tooth extraction, and you should not eat hot and spicy food, and you can have a normal diet only after one week of tooth extraction. For specific diet after tooth extraction, please consult your physician.