Fat cannot come back unless one gains weight again, in which case all body areas will share in the weight gain. However, after abdominoplasty the treated area has a permanently decreased capacity for additional fat, because so many of the fat cells have simply been removed. But there are still fat cells present, so some gain in that area is to be expected with weight gain. Skin stretches with the passage of time, and so as the years go by there will be more skin, and for the same reason the muscles will gradually stretch out again. Nevertheless, a better contour after surgery is in a sense permanent, in that no matter what the person’s age, the benefits remain.