A tummy tuck, also called abdominoplasty is a body-contouring procedure designed to create a smoother, flatter midsection. During surgery, excess skin and fat are removed and the abdominal muscles can be tightened to restore a firmer, more sculpted look. This treatment is especially popular after pregnancy, major weight loss, or anytime sagging skin and stretched muscles make it hard to achieve the shape you want through diet and exercise alone.