I am a runner and have recently noted that my right kneecap is getting "jellyer". When I google searched it some results for Prepatelar Bursitis came up, but the pictures seem to drastic and there is no kneeling or trauma going on. It is not such a huge inflamation, its just that one kneecap is certainly squishier than the other one and progressively getting more and more. I know running is causing it, but I don't understand what's behind it. Also: no pain.