I have a very odd problem on my left knee - I won't say "with" my left knee, because it's not the joint, it's the skin over the kneecap.
For the past 3 weeks or so, it has been extremely sensitive, as though it's been recently grazed, but there's not a mark on it that I can see. If I turn over in bed, and the sheet rubs against it, it's sharply painful, out of all proportion to the contact made. I knocked it slightly today and it really stung - yet there's still no mark on the skin.
I'll give it another day or so and then see the doc, I think. The joint itself doesn't hurt at all: I did 330 problem-free miles last week.
Anyone else had anything remotely similar?