I am 25 years old and recently diagnosed with M.S. and recently started experiencing an unsual symptom. While walking, sitting it doesn't matter, the bottom of one foot will suddenly become almost hot. To touch it, it's still cold/room temperature, but on the inside of my foot it's a warm sensation. It's as if I stepped on a heating pad, but not quite as hot. What would cause this? There is no pain associated with it, it's just a warming sensation in the bottom of my foot. And it usually covers only the ball of my foot, not my heel. And only happens in one foot at a time, but it does affect each foot. If someone could give me some advice that would be awesome!!! :) Thank you so much!!