Bile reflux can occur after gastric pyloromyotomy. This bile reflux is a postoperative complication of gastric pyloromyotomy that cannot be cured, and can be relieved by eating less and more frequent meals and other means of relieving acid reflux. The pylorus is the part of the stomach that communicates with the duodenum and is surrounded by a thick ring of muscle to form the pyloric sphincter, which is the narrowest part of the digestive tract, and has the function of maintaining the pressure in the stomach and preventing the reflux of food debris and bile from the duodenum. After gastric pyloromyotomy, bile reflux occurs due to the loss of pyloric function, and manifests itself as acid reflux. Bile reflux after gastric pyloromyotomy is caused by the complications of the surgery and cannot be completely cured, but the symptoms of reflux can still be relieved by having small and frequent meals and not lying down after meals, in addition to the use of medications such as domperidone to relieve the symptoms of reflux.