People undergo cosmetic surgery for weight loss primarily for two reasons: 1. To enhance the results of their weight loss efforts: Cosmetic surgery can be a way to remove excess fat or sagging skin that remains after significant weight loss. It can help reshape the body and improve overall body contour, allowing individuals to achieve a more proportionate and toned appearance. 2. To improve self-confidence and body image: Weight loss can lead to loose and sagging skin, which can negatively impact a person's body image and self-esteem.