The effects of this are different for each person, however. Some people just have more resilient skin. If they put on 50 pounds, they obviously have more skin. When they take it off, the skin can do two things. It can shrink back, which is of course, ideal. It can also hang there without much elasticity. This can have something to do with age, but not always. Some are going to have sagging skin and others are not. It’s that simple. Another common reason why some have sagging skin is pregnancy. The large stomach associated with pregnancy grows quickly, which means skin stretches as it grows. The skin does not always sag once weight is off, but it can sag elsewhere. The breasts can grow quite a few sizes during pregnancy, but they always go back to the regular size.