I'd also like to add, that your ankle injuries in the past (I thought I read you had an old ankle problem-- but I may have you confused with someone else ), may be causing some tissue compression now. I know from personal experience that past trauma can come back to haunt some of us (scar tissue and all).

Have you tried ice on that ankle? Or on the foot? Ice tends to take nerve pain down. Heat will accelerate it. Some of us have used ice packs on the feet at times to help. Lidoderm patches are also an option, instead of oral pain killers.