Juvederm: Is this hemosiderin staining? Is it permanent? (photos)

I had 1ml of juvederm put in my lips in Sept '16. At around the 3 week mark my bf bit my lip during a fairly hectic romp and the damage was.... bad. A flap of skin came off and the area was bruised, took weeks to heal and the bruise remained. I read somewhere that the filler could have leaked and it would fade as my body metabolised it or whatever. It's been ages. Is this even to do with the filler or is it the trauma? (Recreation drugs make it temporarily worse... changes in blood pressure?)