Hi Wednesday5, Thank you for your question regarding which selection for placement of arm lift scar is better, inside or back of the arm? Plastic surgery is all about hiding scars. Arm lift scars placed on the inside of the arm are MUCH more aesthetically pleasing than back of arm lift scars. Most people hold their arms by their sides, If an arm lift scar is placed on the inner portion of the arm, when the arms are held by your side, the arm lift scars are hidden. However, if you place the arm lift scar on the back of your arm, when your arms are by your side, your arm lift scars are highly visible. In general, if the arm lift is performed correctly, you will barely see the any scar after one year. SIlicone gel, silicone strips, and compression garments are key to minimize arm lift scars. I hope that I have answered your questions regarding the arm reduction and which selection for placement of arm lift scar is better, inside or back of the arm? If you have any more questions regarding the arm lift, arm reduction, brachioplasty or arm crease fat grafting, please contact my office. Since a brachioplasty or arm lift surgery is a difficult procedure, please seek an experienced, board certified plastic surgeon with significant experience performing these types of arm lifts. Do your research. Make sure your chosen plastic surgeon has performed at least 100 arm lifts. Make sure they have the before and after pictures to prove it. Carefully examine their before and after pictures and check their reviews on RealSelf. Sincerely, Dr. Katzen. (Plastic Surgeon, President of the American Society of Bariatric Surgeons, certified by the American Board of Plastic Surgery, Fellow of the International Society of Aesthetic Plastic Surgery, American College of Surgery, International College of Surgery, and American Board of Metabolic and Bariatric Surgery, and member of the American Society of Plastic Surgery, American Academy of Cosmetic Surgery, RealSelf Hall of Fame, and RealSelf Doctor Advisory Board for Medical Review and Consumer Panel.)