You can eat about 2 hours after tooth extraction, as for drinking water can be advanced some more. The reason why this time limit is required is mainly due to the problem of anesthesia after tooth extraction. The currently applied anesthetics are common such as lidocaine and epinephrine type of atticaine. The anesthesia time is around 2 hours, and after the extraction of the tooth itself, the corresponding soft and hard tissues have a certain anesthesia situation, so if you eat too early, there is a possibility that there is no obvious feeling in the mouth, causing the phenomenon of cheek biting or tongue biting. In order to prevent this phenomenon, it is recommended to eat 2 hours after tooth extraction, as opposed to drinking water, which itself does not involve chewing, as long as the drinking water is not too hot, the problem is not too big.