For some reason I can wiggle my kneecap around on my left knee when my led is straight. And every time I work on legs at the gym my knee starts to hurt like crazy. Can some one please help me find out more about why this is happening and what I can do to reduce pain and make my knee not wiggle around so much. It only wiggles if I move it with my hands not by itself. And the other knee is the same only it doesn't hurt and a little less mobile. If anyone can please help me with this that would be great.