Through the method of gastrectomy to achieve the effect of weight loss has a certain degree of risk, there may be gastric fistula, adhesive intestinal obstruction, low-protein malnutrition, and even anemia, as well as weight loss and other hazards, the specifics are as follows: 1, gastric fistula: the operation itself has a certain degree of risk for the gastric resection of the stomach part of a gastric fistula may occur after the operation, because the resection of some of the tissues of the stomach after the gastrointestinal anastomosis, if the anastomosis grows after the operation is not secure on the If the anastomosis does not grow firmly after surgery, gastric and intestinal fluids will seep into the abdominal cavity, causing gastric leakage and causing serious infection in the abdominal cavity, which will make the patient develop systemic inflammatory response syndrome, and even endanger the patient’s life; 2, adhesive intestinal obstruction: after the surgery, it will cause the local tissues to stick together and cause adhesive intestinal obstruction, and the patient will have obvious feeling of fullness after eating, as well as nausea, vomiting, stopping anus to ventilate, defecation, and other manifestations of intestinal obstruction; 3, digestive food Decrease in food digestion function: After the operation, the function of food digestion will decrease, which will cause low protein malnutrition, even anemia and weight loss and other clinical symptoms.