Thank you for your question regarding hydrogel injections into your buttock. The skin discoloration is your body trying to eject the hydrogel product. The pain is due to associated scar tissue around the hydrogel as well as hydrogel positioning the surrounding nerves. Also, the hydrogel does travel. I have seen the hydrogel travel from the buttock to the ankle on selected patients. In conclusion, I would suggest you have the hydrogel removed as soon as possible by a qualified plastic surgeon. Thank you for your question regarding hydrogel injections into the buttock. I specialize 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. 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, RealSelf Hall of Fame, and RealSelf Doctor Advisory Board for Medical Review and Consumer Panel.)