I've been on the vivitrol injections for 4 months now. Every time I go in for an injection, I get a big hard painful lump at the injection site that doesn't go away for a long time. I still have a small lump from my first injection. I've been using a heating pad and just Kind of rubbing it out but when it hurts, it makes it pretty uncomfortable. And my pant line goes right over the area which is also very uncomfortable. I'm wondering if anyone is having similar problems or if there are any other suggestions on how to help dissipate the lumps faster?