I have a similar issue but left knee for me. My entire left side from feet to hips are a problem tighter than the right. I have been told to simply stretch & stretch some more it does work. The pain I was told was from a tight thigh. Where is your pain, location may help determine if it is a bigger issue...mine was called jumpers knee it also hurts when I ride but will go away after I warm up.....Stretching helped & knowing that it is not a major deal helps mentally