Do you feel as though you have the flu? Are you dizzy, or feverish? It sounds almost like you have Shingles, which will also cause a burning rash on the face. If the rash starts to turn to small blisters, please see a doctor as soon as you can, because shingles can be very painful if not treated. Also, certain teeth that abcess will also produce a hot redness in the face, but you will know that because it's painful in the gum area. Fibromyalgia may also be the cause of this. I do sincerely hope that whatever it is, that if it doesn't go away, or gets worse, that you'll seek medical attention (but I hope it just goes away on it's own, and you get some rest).
Moe
Moe