My answer is a yes. Because I have known many people satisfied with the arm lift surgery they have undergone. It removes the sagging skin between under arm and elbow. It really works. I know you will never be wanting your sister to get into trouble neither do I want it! The most important thing that I have to tell you is that hire a good surgeon.
Dr. Joseph Togba is the one whom I know. He is running a plastic surgery clinic at Oakland, California.