Thanks for writing in,
From your history & complaint it seems that the digital sensory nerve
to the finger was cut due to the injury
. Stitches were applied to close the wound and control the bleeding. Usually if the nerve is not fully cut, the numbness
will start disappearing by 2-3 mths. If the nerve is fully cut, then chances for recovery of sensation is less. But this wont cause any disability
in your day-to-day activities, unless you use little finger for activities like playing music instruments.
I would suggest you to wait for another 3 -4 weeks. Drugs like methylcobalamin/pregabalin/gabapentin
can be useful for speedy recovery. care should be taken in terms of avoiding extremes of temperature or injury to the finger which might get unnoticed due to loss of sensation.
Hope this clarifies your query,