Thank you for your question regarding a piece of flesh poking out in a seam in your armpits. Thank you for your question regarding this excess piece of tissue. From your pictures and description, it appears this is granulation tissue. Granulation tissue is the tissue that your body makes to help wounds heal. This granulation tissue appears to have become hypertrophic or has grown too much. That is why it is growing through the hole. Various treatments for granulation tissue include applying silver nitrate and using cautery to burn the excess skin. Also, cautious observation could be a wise route. I suggest you allow yourself to heal entirely and address this area of granulation tissue once wholly healed. I hope this helps to answer your question regarding flesh poking out your armpit incision.   I specialize in arm lifts. I hope that I have answered your questions regarding the arm reduction. 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. (“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, 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 and RealSelf Hall of Fame.)