There is so many problems with my knee, for starters there is a big knot on there. It has been there for a few years. It has always hurt me and gives out on me and locks up a lot. Here recently it has gotten worse. I've tried to go to the doctor but they said they don't know what it is. It feels like my bone. And to think about my other knee hurts so muhi but it don't have a knot. Can someone help?