If it is not gastrointestinal surgery, such as breast surgery, or orthopedic surgery, thyroid surgery. Because the surgery will not affect the function of the gastrointestinal tract, after the anesthesia awake to be able to eat, that is, to be able to eat and drink soup when you can drink milk, but drink milk to ask the patient first, in daily life is not to drink milk? Because some patients may have diarrhea after drinking milk. If you don’t drink milk in your daily life, or if you drink less milk, it is recommended that you don’t drink milk for a while after the surgery. For patients undergoing gastrointestinal surgery, such as intestinal resection anastomosis or gastric surgery, it is usually recommended that milk be consumed after 3 days, or even after 5 days. This is because it is important to make sure that the bowel has recovered, that is, that it is ventilated, and that the anastomosis has healed completely before drinking milk.