Thank you for your question regarding what to do with your arms after a 50-pound weight loss. In analyzing your pictures, you have excess skin and fat. Fortunately, you do not have excess skin and fat all the way to the elbow. Most of your excess skin and arm fat is localized to the inner third of your upper arm closer to your armpit. If you have only excess fat and good quality skin, the surgical solution would be liposuction. I’m afraid due to your age, stretch marks, and significant weight loss of 50 pounds, your skin will not contract. Therefore, I would highly suggest you undergo a limited incision arm lift and arm reduction. The incision would extend from the armpit slightly down your inner arm to remove excess skin and fat. I know this is not the answer you are seeking but it is the best surgical solution. I believe if you just have arm liposuction, you will be left with hanging skin. Therefore, you would have spent that money and recovery time on disappointing results. I would go for the best procedure possible and in your case, this would be an arm reduction with an incision from the armpit and slightly down the inner arm. The procedure will take approximately 2 to 3 hours to complete. Your arm lift and reduction would be done under general anesthesia. Please plan for a two-week recovery after an arm lift. Please seek an experienced board-certified plastic surgeon who has performed hundreds of arm lifts. Sincerely, Dr. Katzen. (“Verified” Plastic Surgeon, President of the American Society of Bariatric Plastic Surgeons, certified by the American Board of Plastic Surgery, Fellow of the International Society of Aesthetic Plastic Surgery, American College of Surgery, and International College of Surgery, and member of the American Society of Plastic Surgery, American Academy of Cosmetic Surgery and RealSelf Hall of Fame.)