The skin contains an adaptable mechanism called elastin fibers, allowing it to stretch, move, and adapt to weight fluctuations. When you experience rapid weight loss or gain, your skin loses those elastic fibers, or rather they become stretched out. Think of a rubber band. When you remove it from the package, it stretches and immediately returns to its original form. But the more you use the rubber band, the more the fibers become stretched, and they can no longer return to their original size. Although your skin will tighten some after weight loss, it is likely unable to fully recover. Even with regular exercise, you will likely have some areas, especially around the abdomen, arms, inner thighs, and chest, with skin laxity that must be addressed with body contouring surgery.