If you have loose skin after losing weight or aging, a skin rejuvenation treatment might help tighten and lift your skin. These treatments can be given nearly anywhere on your body so you can target your stomach, back, arms, or face. Start by talking to a cosmetic doctor so you know what you can expect from one of the treatments given the condition of your skin. In some cases, skin-tightening surgery may be the best solution in the form of a facelift, neck lift, arm lift, or body lift.