Obesity surgery, also known as bariatric surgery, is a surgical procedure performed on people who are obese. It is a last resort option after diet and exercise haven't worked. There are different types of bariatric surgery, each with its own advantages and disadvantages. The most common types of bariatric surgery are: Roux-en-Y gastric bypass: This surgery is the most common type of bariatric surgery. In this surgery, the stomach is stapled to create a small pouch. The small intestine is then reattached to the pouch and to a lower part of the small intestine. This surgery reduces the amount of food that can be eaten at one time and the amount of nutrients that are absorbed from food. Sleeve gastrectomy: In this surgery, about 80% of the stomach is removed. This surgery reduces the amount of food that can be eaten at one time. Adjustable gastric banding: This surgery involves placing an adjustable band around the upper part of the stomach. The band can be tightened or loosened to control the amount of food that can pass from the stomach into the small intestine. Bariatric surgery can be a very effective treatment for obesity. It can help people lose weight and improve their health. However, it is important to remember that bariatric surgery is a major surgery. There are risks associated with any surgery, and bariatric surgery is no exception. Some of the potential risks of bariatric surgery include infection, bleeding, and nutritional deficiencies.