Okay, so I was just laying in bed on my back, not with my legs crossed or anything, just flat on my back, and there was this sharp pain in my heel. It wasn't deep in any muscle or anything; it was just skin deep, like someone was pricking me with a needle. This happens all the time and there's never any pain after the split second of the feeling. But this time it actually really hurt and it went away immediately and then came back and then again and again and again until I rubbed it for a few seconds. I'm just curious as to what it could be, since it never really bothers me, and I've gotten to where I don't really ever notice it anymore.