Hello, I am 60 years old and consider myself to be fairly active. Over the last 6 months I have noticed a hard lump under my left kneecap (chin area) which seems it have developed in size. It is rock hard and not moveable. I have also noticed the same thing under the right knee though the lump is much smaller at the moment . There is no pain. I have never had any kind of surgery on my knees. Recently I was diagnosed with osteoarthritis in the right knee and had experienced swelling and pain. I was prescribed pain relief but have not taken this. I moved to a warmer climate and the pain and swelling has gone!