Warm sensation in bottom of right foot?

What you have described sounds quite similar to a feeling I found myself experiencing some time last year. The feeling was in my right shin and it felt like I would just get this intense not really burning but warm sensation right in one localized area. I had spoken to my podiatrist about it and she suggested that I mention it to my chiropractor. I mentioned to to my chiropractor and she knew exactly what the problem was (although I can't remember it right now). She adjusted be (pay special attention to what she said was the problem area) and I stopped getting the sensations. But it could also be neuropathy or even a sign of diabetes.