What you did wasn't the best idea, but you need to move forward and get treatment at this point. I suggest you seeing a cosmetic dermatologist immediately for a biopsy and culture and a full evaluation. The complications from this can be complex and long term if you don't seek help immediately. I wish you the best, Dr. Emer.
Can you remove PMMA filler
Well that was just not smart. First of all, purchasing PMMA from a banned website is 1. illegal and 2. it means it most likely was NOT PMMA to begin with. So, we now have no idea what was injected into you (or by whom??). Assuming it is PMMA, there is no way to remove that type of filler. But again, and I stress this, most likely it isn't PMMA. It could be cheap silicone; it could be an expired version of another product; it could be garbage. You are going to be lucky to find someone to work on you because many doctors simply can't take on the liability of working on something like this because of malpractice issues. Your first and best bet is to have a biopsy done of the area to even see if someone can determine what is in there. I'm sorry this happened, but this was such a bad idea.
"This answer has been solicited without seeing this patient and
cannot be held as true medical advice, but only opinion. Seek in-person
treatment with a trained medical professional for appropriate care."