MissTiff

I have this strange bump/lesian around my upper thigh/pelvis area that is extremely painful. It is reddish brown in color I would say ( although that may partially have to do with the scarring) Sometimes it swells up and it hurts so much that I can't stand to wear pants. It also can become itchy and painful at the same time. Sometimes it is small enough that it is hardly noticable, the size varies but it is ALWAYS very painful. What is really strange, is that the size can change in a matter of minutes. When it gets really bad it can open up and become an open sore in my skin and sometimes bleeds and has fluid come out of it. There was one time that what seemed to be the whole sore, fell out? And I was left with a HUGE crator. I hoped that whatever it was would not come back after that, but it did. It has been there for a while now and has gotten progressively worse. It is causing pretty bad scarring in that area and the pain seems to radiate a few inches around the actual lesian. A week or so ago right next to it, I got a strange round bump about the size of a golfball, this was not the same thing although maybe it's related? This one was painless however and caused no discomfort other than the size being terrifying. The golf ball size lump that popped up has since disappeared, but the lesian has not. I haven't had it checked out as I have no health insurance.
If anyone knows what this is please tell me, I am extremely worried about it and it is making me miserable from the pain.
Thanks!