General anesthesia is actually harmless to the body. The effects of all drugs gradually disappear after anesthesia, leaving no effect. The so-called "anesthesia first", laymen will say so. Drugs for general anesthesia are injected intravenously, so the drugs will flow all over the body with the blood. Therefore, whether it is head surgery or foot surgery, as long as it is general anesthesia, the effect of drugs is exactly the same. As for the influence of general anesthesia on intelligence, it is a complete rumor, and basically no one can confirm it.

When you are under general anesthesia, you are asleep and can't feel the pain of the operation, but after waking up from anesthesia after the operation, the pain of the wound is inevitable.

There is nothing special about not eating after nasal polyp surgery, but you can't eat anything for 6 hours after anesthesia. This is for your safety. You are afraid of vomiting and aspiration.