I've experienced Tongue Bite.
I don't know why I got it, but I read that it's from packing too tightly or too loosely, having tobacco too wet or too dry, having a new pipe with no 'cake' or an old nasty pipe with too much cake and gunk, just plain having 'harsh' tobacco.......so it can be caused by many different factors I guess.
I got it several times with cigars. In retrospect I think I was puffing hard and fast, and maybe those were some Thompson cigars.
