I have a hard lump or knot on the mid joint of my pointing finger on my left hand. When i bend my finger up and down and touch the joint of the finger with the hard lump on it , it seems like the lump seems to stay on the joint and it moves just a little, when i press on it. And also, when i press on the hard knot on the finger joint, it feels kind of like the joint is bigger on the outside under the skin in the joint. I think it burns now a little when i start pressing on the knot really much.