Hello DORIS PORTILLO, Thanks for your questions! Injectable silicone used for body contouring is not FDA-approved and can cause serious side effects that may be permanent or may even lead to death. Foreign body reaction (granuloma, fibrosis) ulcers, fistulas, infection and ptosis are common local complications after Biogel injections. The treatment varies among patients. This may range from surgical excision, to hyaluronidase injection followed by VASER Liposuction and fat transfer to the buttocks to correct the resultant deformity. I would recommend you consulting with an experienced plastic surgeon about your specific needs and concerns. Good luck and may God bless you! Dr. De La Cruz.