Firm, toned skin

The areas of skin on the body that sag are almost always the same: the arms, breasts, the stomach below the navel and the inner thighs. This sagging can be sped up by an extreme diet, weight changes and pregnancy. Skin reacts in two ways to shifts in volume: either by stretching or by creating more skin. Stretching can respond to collagen and elastin treatments. One problem of excess skin is that it needs to be removed through surgery.