Obesity brings problems to people is well known, more so for girls, beautiful clothes can not be worn, dating low self-esteem dare not face the public ……. In addition, obesity will be accompanied by more troublesome problems, which is the metabolic syndrome, including diabetes, hypertension, polycystic ovary syndrome. Weight loss surgery has its own adaptable group Professor Zhu Jiangfan said, for the progress of obesity treatment, people have a conceptual change, obesity is a disease this idea has gradually been accepted. At the same time, people are not only concerned about obesity itself, but also more about the metabolic syndrome brought by obesity, including hypertension, hyperlipidemia, type 2 diabetes, polycystic ovary syndrome, sleep apnea and so on. Talking about the appropriate population for surgery he pointed out that “In a recent paper published in the prestigious surgical journal The Lancet, the authors suggest new surgical guidelines for weight loss and metabolic disease based not only on the human body mass index (BMI) but also on a number of indicators such as the metabolic disease that the patient is associated with. The 2014 edition of our “Expert Guidelines for the Surgical Treatment of Diabetes” states that surgery can be considered for those younger than 65 years of age, with less than 15 years of diabetes, a BMI greater than 27.5 kg/m2, and assessed to have fair pancreatic islet cell function.” For fat people who are obese with hypertension and polycystic ovary syndrome, as long as there is a certain degree of obesity, weight loss surgery will have better results. There are currently two main approaches to weight loss surgery, gastric bypass and gastric sleeve resection, both done with minimally invasive laparoscopic techniques. In the past, the surgical selection criteria were based on gastric bypass. This surgical approach is riskier and has more prominent nutritional problems after surgery. The laparoscopic gastric sleeve resection, which is now widely used, is a relatively safe and simple surgical approach to weight loss. This technique does not alter the physiology of the gastrointestinal tract and has much less impact on post-surgical metabolism and nutrition. A gradual resumption of diet is required after surgery as directed by the surgeon, usually starting with a slow intake of water, gradually increasing liquids such as juice, milk and broth, and then transitioning to a semi-liquid and normal diet. Getting rid of obesity also brings confidence to the patient Weight loss not only reduces weight, but also cures metabolic syndrome at the same time, thus completely changing the life of fat people. Many people were reluctant to go out and avoid social interactions because of their obesity. Now they have become beautiful and confident. Huge changes have occurred in work, choice of spouse, and married life. There is a cab driver who, in addition to obesity, also has diabetes, polycystic ovaries, hypertension, sleep apnea, and has to take a lot of medication every day. After the bariatric surgery, in addition to losing weight and becoming beautiful, all the accompanying metabolic syndrome was cured, and many of the medications she needed to take were no longer needed. A couple from Jiangxi brought their daughter with polycystic ovary syndrome to Oriental Hospital for weight loss surgery. On the third day after the surgery, the daughter was surprised to find that she had her menstrual period. Three months after her discharge from the hospital, the parents expressed their gratitude to Dr. Zhu, saying that the child had lost weight, looked beautiful, and her menstruation had returned to normal. Most of all, the child’s personality has also become cheerful. Many fat people have polycystic ovary syndrome and have been relying on medication for years to maintain their periods. Due to high androgens, many of them show rough skin and acne, and they look like an old woman at a young age. After surgery, the hormone balance is restored and the skin regains its feminine features, becoming delicate and rosy, while menstruation returns to normal. Why bariatric surgery can treat metabolic syndrome In fact, bariatric surgery is not only used for weight loss, but more importantly for the treatment of metabolic syndrome. However, to date, the rationale for the ability of weight loss surgery to treat metabolic syndrome is not clear. The classical theory is that food does not go through the foregut but reaches the hindgut earlier after gastric diversion, thus causing some hormonal changes that lead to the rapid remission of metabolic syndrome. In this regard, Prof. Zhu Jiangfan and explained in one step: “However, the anterior and hindgut theory does not explain how the other two types of weight loss surgery, namely gastric banding and gastric sleeve resection, can also treat metabolic syndrome. In these two cases, the continuity of the digestive tract is not interrupted, and there is no question of food stimulating the hindgut earlier or bypassing the foregut. There is also the poorly explained problem that the metabolic syndrome often resolves without adequate weight loss. Most polycystic ovary syndrome usually results in menstruation right after surgery; hypertension usually drops to normal 1 week after surgery; diabetes tends to recover in about a month. There is not much weight loss at this time. It is also curious that only surgery involving the stomach can treat the metabolic syndrome. The only way to explain the above is the gastric center hypothesis, the key link of which is in the greater curvature of the stomach. It is likely that there is some special cell in the greater curvature of the stomach that produces specific, as yet unknown, factors involved in mediating important metabolic processes. The removal of the greater curvature of the stomach after gastric sleeve resection; the bypassing of the stomach and the direct passage of food to the small intestine after gastric diversion, most likely leads to a decrease in the secretion of a specific factor that allows insulin resistance to be relieved and a decrease in sympathetic tone, leading to the remission of metabolic diseases such as diabetes, hypertension, and polycystic ovary syndrome.”