I'm about 14 soon to be 15 on February 16. I'm 5'10 and 3/4, my knees and below my knees are sore. I had to quit football because of the pain. I originally went to the doctors and got a MRI there was nothing wrong. Every time I go for a run I can feel pain in or below my knee around the tendon area. It bearable but not if I over do it like in in football. During January 2014 I was diagnosed with Lyme Disease which usually attacks your knees and I'm cured now. But concerned because I don't know if its growing pains or something else.