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hippy
Yes. As above, it's nerve damage.
Ulnar nerve is the little finger side of your hand and radial nerve is the thumb side. It's possible to damage both.
Pins and needles / numbness is the first stage. If you damage it more, you would get impaired movement,
Depending on the length of the damaged bit, the nerves grow back at a certain rate, about 1mm per week, I think (if the damaged bit is too long they won't grow back, but that is not normally the case with cycling injuries, it's when you damage it up at the shoulder, or elbow)
I had it after Indypac where I couldn't move my last three fingers from side to side (so if I tried to cup water in my hand it would run through the gaps) and didn't ride a bike at all for a couple of months so as not to impede the recovery. They did get better and all normal now.