Weight loss surgical methods are commonly used such as gastrectomy, which may be associated with intestinal obstruction, malnutrition, and other hazards. Gastrectomy surgery generally involves the removal of the stomach, which can reduce the volume of the stomach and lower food intake, thus providing weight loss. After gastrectomy surgery, adhesive bowel obstruction may occur, which manifests itself as abdominal pain, nausea, vomiting, and possibly difficulty in bowel movements. After gastrectomy surgery, digestion and absorption will be weakened, which may cause malnutrition, anemia and other hazards. In addition, weight loss surgery needs to be chosen only when there are indications, and those who need surgery are advised to consult their doctors.