Loose skin is characterised by a lack of definition and sagging on parts of the body and face as your skin loses its natural elasticity. It is most commonly associated with the jowls and upper arms, as well as the areas around your abdomen and thighs.
Your skin becomes looser and firmer with time as a natural part of the ageing process. The body’s production of collagen and elastin, the proteins that make up the underlying structure of the skin and give it its strength and suppleness, slows down the older you get.
Age also causes the muscles that support your skin to weaken, and may allow fat to form in various parts of the body, causing sagging.
Other factors that can play a major part in creating loose skin are smoking and prolonged exposure to the sun, both of which have been shown to damage collagen and elastin production, robbing the skin of its firmness and causing it to droop as gravity pulls down on it.
Losing a large amount of weight over a short period of time can also result in excess areas of skin, as the tissue may have been stretched too far to be able to regain its former tautness. Extreme weight loss primarily through dieting without exercise has a similar effect.