Hi there. It very much sounds like an allergic reaction! the throat swelling, the jaw part sounds like an infection which is very possible - any time you cut into the skin you open yourself up to infection - radiated skin takes a lot longer to heal particularly if radiation was fairly recent, and because if this there is more chance of infection as well. Also the hot and cold flashes are another indication of infection (unless he's having a problem with any meds) do ask about the possibility of a localized infection. Hugs and tell him to get well soon! Oh and the ct sounds great! Hope it's indicative of the biopsy results....