Any question answered...

I've had a numb fingertip for about a month now.

Mine was caused by poor handlebar position.

It doesn't hurt and is only numb in a very small area so I'm just going to wait it out and see if it gets better.

My right ring finger went numb for about two weeks when i cycled through France last year. It should right itself, as Tiswas said, it's a compressed Ulnar nerve.