i don't have any way of evaluating the extent of your nerve injury but think of peripheral nerves in the fingers as "branches" of a tree. not just the main trunk (of the radial nerve). you may have only cut a small branch -- one of several going down the thumb -- in which case it may be near-impossible to reattach but may reattach naturally over time (since both ends are very close). the thumb is very important so having a hands-on (no pun intended) opinion from an orthopedic hand surgeon is vital; and the sooner the better. wounds should be sutured in less than eight hours to help prevent infection but it can be easily opened again by the hand surgeon days later so don't panic. fyi: webmd health experts on not on-line 24/7 like an answering service so it would be best not to use webmd answers when asap or rapid responses are required.
cut my thumb and was told i possiably severed my radial nerve why not repair it before stitching my thumb? why not asap. i have a follow up with orthopedics to confirm however i am pretty sure the emergency room doc was correct i am still having numbness on the back outside of my thumb.