Unfortunately mine has spread to my mouth, tongue, throat, etc. It's a strange burning, tingling, raw feeling, and yeah cold and hot hurt like crazy. Years ago a medicine caused thrush in my mouth...3 times before my doc finally took me off of it. Since then, thrush would come back easily if I was on antibiotics or used my inhaler. I haven't done either in over a year, so I knew this wasn't just thrush coming back. Not to mention it felt totally different. Now I find myself letting chips, cereal, crackers and such soften in my mouth before trying to chew them...though I forget sometimes and pay the price. I can only take sips at a time now, too, without causing major pain issues that set off a cataplexy reaction. Not fun at all.