If elective minor surgery is performed, that is, minor surgery that can be removed under local anesthesia, there is usually no requirement for fasting and drinking time. You can eat and drink in the morning of the surgery, but you should not eat too much. In the case of surgery requiring anesthesia, that is, when general anesthesia or continuous epidural anesthesia is required during the surgery, it is generally required to fast for 8 hours and to abstain from drinking for 6 hours before the surgery. This is because after anesthesia, there is a risk of aspiration during the recovery period. If you are under anesthesia or not awake, the regurgitation of gastric contents can lead to aspiration into the lungs, resulting in respiratory failure and lung infection. But nowadays, we advocate rapid recovery, which requires a 2-hour drinking ban. The purpose of this is to reduce insulin resistance and promote rapid recovery after surgery.