In reply to My Gravity:
I got fairly bad frostbite (i.e. black peeling flesh) on three fingers back in 92. Here's the history:
1/ Saturday night, topped out on NE buttress at about 1 am with no fingers left on gloves and all fingers numb.
2/ Feeling still not returned next morning. Spent an hour or two with fingers dipped in Trangia in tent near CIC before packing and descending.
3/ Sunday night A&E at Edinburgh RI saw me presenting a mess of fingers, three of which (right index, middle and ring fingers) were yellow, black and blue past the inner knuckle. This is a bad sign. If yours are at all discoloured then seek medical attention. If they are just a bit red and numb then this is just frostnip and will clear up in a few years (I still have a lump in my cheek from this).
4/ If you have punctured the frostbitten area then there is a possibility of infection and gangrene. I came close to having the end of my index finger lopped off but kept it clean and protected for the crucial first few weeks.
5/ You may have damaged or killed of the nerve endings commpletely so be careful with it. You will have also damaged the flesh and the best way to promote regeneration (so the Drs told me) was to drink a fair bit of red wine to keep the blood flowing.
Good luck and get it looked at now rather than after you've developed any symptons on the list above - preferably by someone who's seen it before. I still have very limited sensation in my index finger 15 yrs on.