Loose skin occurs when the skin loses its elasticity and begins to sag.  This is often caused by factors such as significant weight loss, aging, and pregnancy.  As we age, the production of collagen and elastin, the proteins that give skin its structure and elasticity, decreases, leading to sagging skin.

The appearance of loose skin can be improved through various treatments, ranging from non-invasive procedures to surgical options like a tummy tuck or arm lift.  The best approach depends on the severity of the loose skin and individual preferences.