I've had burning sensations in various parts of my body over the last year, very annoying. They come and go, sometimes feels like ive been dipped in acid. Doc said its stress/anxiety, I've googled, and yes it could be neurological but I have found more people who have nothing wrong, been tested and everything, all clear, its all anxiety. If youre gonna google it stick 'anxiety' with your search, see how many people have it, very common.
PS i know what you mean about it in your nose and throat, I could tell if it was coming on there because I would start to get the urge to sneeze a lot.