I developed a small patch of hives above and inbetween my breasts when I visited Chicago in October. I live in ABQ. I assumed I was allergic to something in the air there, but now that I'm back home, the area of the rash is widening, and seems to be spreading up both sides of my throat. It is not oozy, but does itch, and it is quite red. Do you think it's hayfever?