What Is a Double Chin?
A double chin, medically called submental fullness, is an area of extra fullness
underneath the chin and along the upper neck. It can be caused by several factors:
Subcutaneous fat — the most common cause; fat accumulates beneath the chin. Genetics — some people naturally store more fat in this area, even at a healthyweight. Aging — skin loses collagen and elasticity, which can create sagging beneath the jaw.
