I have a hard (boney) bruised lump on the upper right part of my knee cap. It hurts to touch it and put pressure on it when I am walking. It is also swelled (kind of feels like there is fluid in it). I also feel grinding at the top of my knee when I move it and there it pops on the left side. Almost two weeks ago I fell and skinned the same knee pretty badly. The part that got skinned is healing nicely but I don't know what this lump is. Any ideas on what this could be? And is it something I should go see my doctor about?