Some obese people solve the obesity problem by Weight-loss surgery. Weight-loss surgery might be an option for people who have extreme obesity (BMI of 40 or more) when other treatments have failed. Weight-Loss Surgery there are two types include banded gastroplasty and Roux-en-Y gastric bypass. For gastroplasty, a band or staples are used to create a small pouch at the top of your stomach. This surgery limits the amount of food and liquids the stomach can hold.For gastric bypass, a small stomach pouch is created with a bypass around part of the small intestine where most of the calories you eat are absorbed. This surgery limits food intake and reduces the calories your body absorbs. Weight-loss surgery can improve your health and weight. However, the surgery can be risky, depending on your overall health. Gastroplasty has few long-term side effects, but you must limit your food intake dramatically.Gastric bypass has more side effects. They include nausea (feeling sick to your stomach), bloating, diarrhea, and faintness. These side effects are all part of a condition called dumping syndrome. After gastric bypass, you may need multivitamins and minerals to prevent nutrient deficiencies.