Sagging skin is a common sign of ageing but it can also be caused by dramatic weight loss. Sagging skin can be present on the face and body and goes hand in hand with a loss of volume and fat. As we age the collagen and elastin in our skin, which makes it appear plump and firm in youth, begins to degrade and this leads to the skin becoming more crêpey and saggy. When our skin is firm and plump it stretches and snaps back into place but as we age it loses this ability. Although sagging skin is a natural part of the ageing process, lifestyle factors can make it occur earlier in life on or contribute to it becoming worse. These include things like smoking, sun damage and yo-yo dieting (repeated weight loss and gain).