Three farts four days after the operation are considered to be flatulence. Generally speaking, the anesthesia for surgery affects the peristalsis of the gastrointestinal tract, so it is important to observe whether the gastrointestinal tract is clear and whether peristalsis is restored based on the gas discharge. Moreover, if you have gastric surgery, it is more likely that electrolyte disorders will cause gastrointestinal peristalsis to fail to recover, so you should pay more attention to whether or not you are passing gas. After the surgery, the gas flow depends on the size of the surgery and the patient’s physical condition, usually the gas flow will be resumed in 1 to 2 days after the surgery, and the latest 7 days. If there has been no venting, it is important to be on the lookout for intestinal obstruction. So if you have three farts four days after the gastric surgery, it is considered to be exhaustion, which proves that the intestinal function has resumed peristalsis and that the intestines are open. For specific precautions after gastric surgery, consult a medical professional for advice.