Hello, I have been having a little problem with my patella tendons for a while off and on they would flame up and it will feel like something is going to pop when bending, it happens in both knees, I put ice on and by the next day it's gone. I use to play a lot of basketball and football I am now 35. Last wk I was playing basketball and when I came down from jumping I had a real sharp pain in my knee and could not continue. Around the top of my knee cap is tender and hurts and when I put pressure on my knee getting out the car or anything I get sharp tack like pains under my knee cap and sometimes on the side of my knee and it aches a little, I have really slight swelling but I am able to walk. What do you think it is and what should I do?