I've had a similar sensation periodically. Never lasted more than a few days and never amounted to anything in my case. On a somewhat related note, I've recently been able to focus and maintain my mind of intent at the very crown of my head much more consistently while practicing the f...
A cut on either side of the finger may break the digital nerve, which results inloss of sensation on the affected side of the finger distally to the cut.The distal part of the nerve dies off and the proximal part can then regrow into the denervated part at a rate about 1 mm a day...