In reply to Jessiclimbs:
I crushed my big toenails in a fall once, they eventually came loose. I trimmed off what I could as bits came away, glued carbon fibers over what I couldn't until they were ready then when all the loose bits were gone I protected the nail bed and the new nail with tape and plasters while it was still tender.
If climbing hurts enough to not be fun after you've done what you can to protect the finger take the cue to do something else for a while. If it doesn't then I don't see a problem.
jk