Bariatric surgery is one of the treatments for obesity and there are complications after bariatric surgery such as short term complications like bleeding and long term complications like nutritional deficiencies. Short-term complications include bleeding, anastomotic fistula, gastrointestinal obstruction, and ulcers. Long-term complications include nutritional deficiencies, cholelithiasis, and internal hernia formation. Surgical treatment of obesity carries certain short- and long-term risks, and the long-term effectiveness and safety of this treatment, especially in our population, has yet to be evaluated. Weight loss surgery needs to be evaluated by a professional doctor before surgery, so patients who need weight loss surgery should go to a regular hospital to consult with a professional doctor, and if they are suitable for weight loss surgery, they should follow the doctor’s instructions for treatment.