A couple years ago I twisted my knee, and there was so much pain that I was limping while walking. At the time I wasn't anywhere near my home so I could not get a brace on. When I finally did, the pain became worse. Tried taking things slow but that didn't help... and I noticed a growth or bump on the left side of my left knee... when I put my hand on my left knee I can feel it grinding, where-as my right knee is as smooth as ever.

Can anyone tell me what the medical term is for the hard growth on my knee? I had read somewhere (although I'm not sure where) that it was caused by the two leg bones rubbing on eachother harder than normal, which caused a bone growth, that consequently could lead to nerve damage if it hit the nerve that runs along the side of the leg????