My 8 yr old son had his T & A taken out 8 days ago. He has pretty much been responding like most kids, but today he felt dizzy and like he was going to be sick, then he was suddenly fine, but tonight he has suddenly developed a huge rash all over his sides, back, stomach and legs. Its not responding to the itch creams or Benadryl spray, so we gave him some children's Benadryl and are waiting to see if it helps. Is there any way this is related to his tonsils and adenoids being taken out?