Some of Peripheral Neuropathy posters use a cream called Zonalon. This is a drug similar to amitriptyline which is used orally. It helps with pain topically.

Try to recall if you used it in the past. Oral use of amitriptyline in low doses is mentioned elsewhere on the net. Either that or Lyrica. I'd go with amitriptyline first.

I am getting a sense that there is a trigger for your problem.
Find that trigger, and you have your answer.

For example... bicycle seats are known to damage nerves in the pelvic floor of males. We see all sorts of new better types now
to prevent this.

http://hubpages.com/hub/May-Your-Bic...ic-Seat-Online

Yours is not a common problem. There is very little on the net about it in fact. We've had some men on the men's forum who described numbness and lack of feeling, but not the reverse.

Do you have pain or numbness elsewhere too? That would suggest a systemic problem.