Hi, thank you your question regarding what is happening to your buttock after illegal buttock injection 7 years ago. Basically, your body is reacting the the silicone. Your body is making scar tissue around the silicone in an attempt to wall off the silicone. To create scar tissue, there is a whole cascade of chemical reactions. This cascade starts with increased blood flow-- that is why there is swelling and "peu d'orange" or orange peel skin. Then, there is release of histamine that causes the itching. Then, your body tries to eject the silicone through the skin. This can cause skin color changes. Usually, the skin turns purple or even black. Bottom line, GET THIS BUTTOCK SILICONE REMOVED ASAP. I specialized in silicone buttock removal and subsequent buttock reconstruction. I am the Director and chief clinical investigator at the Institute of Silicone Removal. Since removing silicone from the buttock is a big procedure, please seek an experienced, board certified plastic surgeon with significant experience in removing silicone from the buttock. Do your research. Make sure they have performed many buttock silicone removal surgeries and have the before and after pictures to prove it. Carefully examine their before and after pictures and check their reviews on RealSelf. If you cannot find an experienced, buttock silicone removal surgeon in your neighborhood, consider traveling out of state if you must. I hope that I have answered your questions regarding the silicone in your buttock. Sincerely, Dr. Katzen. (“Verified” 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, and International College of Surgery and member of the American Society of Plastic Surgery, American Academy of Cosmetic Surgery and RealSelf Hall of Fame.)