My girlfriend got butt injections a year ago, and now one cheek is hard. What do I do?

My girlfriend was injected by a man named Michael who comes from Florida to Houston and does it she had a total of 3 sessions everything was fine up until a couple of weeks ago her cheek began to get very hard and the hard part kept getting bigger, now it's warmer than the other cheek and a little bit darker. She's scared and distraught and I just want Her to feel better and make her feel safe I contacted dr filiberto Rodriguez in Edinburg Texas who specializes in these cases