question: I m a footballer(soccer),I m 37,had my acl reconstruction when I was 17..(right knee)..had numerous clean ups. I have done years of bike work to keep my legs(muscles)in shape..I have been getting (bubble like) swelling on the side of my kneecap on the outside of my leg..it s just started happening on my good knee(left) also.. I was wondering why this is and also is this doing more damage to my knees..