First of all, my spots don't hurt, and they seem to heal, so it might be totally harmless. But I still post this question since I've had similar spots at least once a couple of years ago, so I'd like to know what it is.
I'm a 25 year old male. Two weeks ago I noticed I had a lot of spots on my hands and feet, 50-100 in total if the very small ones are included. Most have now disappeared from my hands, but some are still there, especially on my feet. Most of them don't itch or hurt, only a few ones on my fingers do (they hurt a little when I touch them, not much though).
First I thought it was bugbites, but I didn't have a single one outside of hands/feet, so I guess it's not.
I've also noticed that a few of my finger joints began hurting a little, but not much. If I press the finger joint or hold a fork/knife they can hurt a little, even when there is no spot right there.
Also, during one or two days, I had lots of smaller red spots on top of the feet, at the same area as the hair grows. I had to look closely to see them, and in contrast to the other spots they where itchy (that's how I noticed them). They appeared and disappeared at the same time on both feet, in a "synchronized" manner. These are no longer visible, hence not visible on the photos below. I've marked the area on the photo though. It is these small spots on top of the feet at the same area as the hair grows, that I have had before, but that time they lasted longer. I have not had the other larger spots on hands/feet before.
Take a look at the photos here. The photos are just shot (two weeks after the spots appeared). The hands have almost healed and there are only a few spots left, but the feet have not healed as much: