Takes time: I'm not sure why, if your only injury was at the tip of the finger you would be numb at the base of the finger. The tip of the finger is so sensitive that you may just be interpreting loss of sensation at the tip as including the entire finger. Also swelling will cause numbness. The good news is that almost all nerve injuries in a finger regenerate but it can take a year or more.
Answered 8/16/2014
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