Many people, when they are fat, will think how they are so fat, ugly, wearing clothes too ugly! In fact, the most important thing to worry about obesity should not be the body shape, but the health! Obesity has now appeared in the list of diseases as a chronic disease, and has a great impact on modern society. Many metabolic diseases and malignant tumors originate from obesity. For obese people, the first step to preserve their health is to lose weight. Among the many weight loss methods, weight loss metabolic surgery is very effective, can be effective in the long term and largely alleviate the associated concomitant diseases, but this surgery. But weight loss surgery is not something you can do if you want to, it has strict surgical criteria. Usually we say that a person is fat or not fat maybe just by feeling, but for weight loss surgery, BMI is an important measurement indicator. The Chinese Guidelines for the Surgical Treatment of Obesity (2007) stipulates that patients who are between 16 and 65 years old and who do not have alcohol, drug dependence, severe mental and intellectual disabilities, and who have tried other weight loss methods that are ineffective or intolerable, should meet these prerequisites and also have one of the following conditions: confirmation of the presence of metabolic disorder syndromes related to obesity, such as hypertension, diabetes and fatty liver ; waist circumference ≥ 90cm for men and ≥ 85cm for women. Then, according to the different BMI to choose different levels of surgery, when the BMI ≥ 32.5, you can actively operate; when the BMI is 27.7 to 32.5, you can consider surgery; when the BMI is 25 to 27.5, you should carry out surgery carefully. Weight loss surgery is not just done for beauty, but more importantly to prolong life so that you can regain your health.