hey 2-ton, I "think" I know what you mean by the burning feeling, I think. Sometimes if I do a certain something wearing a certain pair of boots, the lower backside of my right heel burns. It isn't on the bottom or on the back of the heel, but on the area that curves inbetween. I can't remember what it is that does it, it has been awhile, "about a year" since it has happened. I think it was if I had my foot propped up, like on a desk, and at a weird angle it would do it. But mine goes away after a couple of hours. I don't know if this is what you meant by burning or not. But burn is exactly what mine did.
Whiskey