Questions about dry ice skin "burns"?

I have small spots on my feet that I think might be dry ice burns so... first of all, do the spots show up on your skin immediately after it comes in contact with dry ice, and second, does it ever go away?

Questions about dry ice skin "burns"?
My question is how you got dry ice burns on your feet? Anyway, I think the spots would come right away because you just killed your skin cells. It should go away your body is good at healing many small injures. %26gt;.%26lt;