I can’t offer advice on this topic but will say I’m likely heading down that road with my lower lip and chin. It’s still completely dead. I’m only 7 weeks out, sure, but my upper lip, nose, cheek, etc. were all also completely numb and have significantly regained sensation.
When I rub a small part of one side of my chin, I also get nerve pain in my lower teeth. It makes washing that area of my face unpleasant.
I’m taking very high doses of methylated B12 to oversaturate my body and will see if that helps..