Some patients can eat grapefruit after surgery, and some cannot, depending on the time of eating grapefruit, and what kind of surgery was done. If it is within 6-8 hours after the surgery, you cannot eat grapefruit at this time because the anesthetic is not fully metabolized and eating grapefruit may cause nausea and vomiting. If the surgery is superficial and local anesthesia, grapefruit can be eaten for a short period of time after the surgery. If the patient is having gastrointestinal surgery, you cannot eat grapefruit for a short period of time because the gastrointestinal tract has not yet grown, and eating grapefruit too soon may lead to gastrointestinal fistula. So whether or not you can eat grapefruit, you need to consult with your attending physician. You should not drink drinks containing alcohol for a short time after surgery, do not eat foods that are too spicy, not to mention pickled foods, etc. Some patients should also not eat foods that are too oily.