I have been suffering from a stiff, achy pain on the medial side of each knee the last three days, which I feel whenever walking/running. I haven't suffered any injuries; however, I just started a new job three weeks ago that has me confined to a desk all day. Could this have anything to do with it? I know this particularly concerns the lower back more than anything, but I don't know what else could be causing it. Bursitis, maybe?
Thanks in advance!