Our skin and underlying support tissues are remarkably resilient, but there are limits. When our skin is overstretched for a long period of time, it sometimes cannot rebound down to its former degree of tautness. That’s what happens with the localized stretch-weight gain of pregnancy. It also happens if a person gains and then loses a large amount of weight. The general slackening that comes with aging also plays a role, as we all develop a little abdominal pooch as we get older. Hormones play a large role in how and where we lay down fat. As we get older, we tend to have higher amounts of subcutaneous fat.