Allergic to MAC cosmetics?

Hi! I have around 8 lipgles,4 lipsticks, and 2 tinted lip conditioners from MAC. It seems that every one of those breaks me out. I get a red rash all around my mouth but I'm not sure if it's MAC that's breaking me out. I just got through a really terrible rash on my face and I haven't been able to use anything but burt's bees lipbalm. Is it the vanilla fragrance that's in the lip products that breaks me out? Lipsmackers and drugstore lipglosses with flavor always give me a rash, but even high-end makeup like MAC does?