The risks of buttock enhancement are similar to those of any plastic surgery procedure. There is a risk of bleeding, infection, and scarring. There is also a risk of nerve damage, infection, and skin death due to the injections. The results of the procedure can be unpredictable and even if the procedure is successful, the shape and size may not be as desired. Additionally, fat grafting can result in lumpiness or irregularities in the area. Problems with the implant can include shifting, hardening, and even rupture. It is important to discuss the risks with your doctor prior to the procedure so that you can make an informed decision.