Cosmetic Surgery in Brazil! - Whether a person loses weight through diet and exercise or through bariatric surgery, there are a few problems that arise as a result of the weight loss. One that will be most noticeable is the loose skin that remains after the weight is gone. When someone is overweight, the skin stretches to accommodate the increased volume of weight. After weight loss, the skin often fails to tighten, and so it sags. In many cases, it hangs (especially in the arms, stomach, thighs, breasts, and buttocks).