After weightloss, especially if you have lost weight fast, you may find yourself with a flabby lower belly, big love handles and/or lots of visceral fat around the navel area. Excess skin is the skin you're left with after losing a substantial amount of weight. Typically, you will see this extra skin flab on your stomach, under your arms, on your legs and elsewhere. Belly fat tends to be the most challenging part to tighten especially after giving birth.