You should avoid eating bananas after gastric perforation surgery. You should fast for a period of time after gastric perforation surgery to avoid stimulation of the wound, which is not conducive to the recovery of gastric perforation, and after the condition gradually improves, it is best to take liquid, non-slag food as the main food, which will not stimulate the gastric mucosa and will not lead to hyperactive gastric motility. Banana itself is a cold fruit, so it is not suitable for consumption after surgery because it is too cold in nature and has a certain effect on the recovery of gastrointestinal function. Bananas also have a large amount of dietary fiber, which has the function of promoting the increase of gastrointestinal peristalsis, and once the gastrointestinal peristalsis increases, it will affect the recovery of the wound after surgery. If you want to eat bananas, you can cook them and eat them only in small amounts each time.