Anyone who has ever stood in front of the mirror, lifted their arm to a 90-degree angle, and flapped in such a way that the underside jiggles back and forth is probably familiar with the term “bat wings.”

Doctors say the upper arm is one of the most commonly complained about areas among older people and those who have had dramatic shifts in weight; but the solution isn’t always as straightforward as simply liposuctioning the fat cells out, as many patients come in thinking.