Thank you for your reply. I've read the articles you suggested, and yes, this is exactly what my fingers and my mouth are feeling. It is a dichotomous comfort, because I am glad that someone knows what it is. Resolving the problem is obviously another matter. Does the B12 deficiency require injections such as those given for pernicious anemia?..or can B12 capsules be taken? In any case, thank you so much for this. It's much appreciated!