Did you ever wave to someone only to be horrified at how the skin underneath your upper arm flaps back and forth? Unfortunately, as we age our skin becomes stretched and loose. The upper arms give away a person’s age, as the excess skin can’t be hidden, except by clothes. The traditional surgery for this condition is an arm lift. This surgery used to involve a long scar down the inside of the upper arm, from armpit to elbow. This has the effect of removing the excess, hanging skin but results in a scar that is worse looking than the original flabby skin.