Finger Swelling Snow My Finger Feels Like Leather? :/?

My finger feels like leather? :/? - finger swelling snow

I was about an hour outside for about ten minutes he was not wearing gloves, (bad choice, I know) and now I came back and my fingers swollen and hard and feels like leather. What should I do? and what is wrong with that?
Ah yes, the over 23 degrees outside, but feels like 15 and Snow