answered question 12/3/2008 I Have Fluid Under My Knee Cap,but I Also Have A Lump Behind My Knee Where It Bends.This Morning When I Wok Up My Ankle Was Swollen. Can You Help? I would definately go to a doctor, if you haven't all ready. I'm no doctor, but I would definitely be concerned about a clot waht the lumb behind your knee.
