We all know that weight loss is about fat burning, by controlling diet and enhancing exercise to make fat into energy to burn off, so in theory, as long as you can increase consumption or reduce intake methods can play a weight loss effect. However, in actual operation but found that it is not the same thing, even if we spend a lot of energy to exercise, diet, but the weight still can not fall down, or at first can reduce a little, but soon how can not reduce, and this is due to stubborn obesity caused. Stubborn obesity refers to through diet and drug treatment, weight is still no significant reduction of obese people. Stubborn obesity is caused by many factors, for example, because excessive dieting and exercise make the basic metabolic rate fall, so that energy consumption becomes low, so that energy intake and consumption to re-achieve a balance; there are leptin in the body and other regulation of fat, when the fat content becomes low will promote appetite, in order to replenish the consumed fat. At present, the better way to treat stubborn obesity is to reduce the stomach surgery such as gastrointestinal surgery, which can directly change the physiological structure of the digestive tract, reduce the stomach capacity, reduce the absorption efficiency, and also improve the endocrine, strengthen the efficiency of fat decomposition and reduce the efficiency of its synthesis. Currently, more than 500,000 people worldwide undergo this type of surgery each year, and from the clinical results, most patients are able to lose 60% to 80% of their excess weight within a year. In China, the annual number of surgeries has exceeded 10,000, and is still growing. In the foreseeable future, this type of surgery will help more people get rid of obesity.