Illegal Butt Injections - Los Angeles, CA

So I got 1 treatment of injections a few years ago. I help with a dent I had on the sides on the bottom of my butt, but I didn't go bk for more. Probably a year or 2 after the skin on my butt became purpleish and still is. 1 yr. ago I got a TV and I wanted the fat from lipo transferred to butt but a Mexican Doc said I was putting my life at risk. I really want implants but don't know if I can. Has anyone gone through this?