A lot of times when I'm wearing a full face my cheeks itch like crazy. its annoying me. I've let the people at Mac and Lancome do my make up for me so i dont think the issue is the cleanliness of the brushes, because it happens when i do my own make up as well. right now I've been sticking to highlighter, no blush, and no powder or liquid foundation (although i've been told i dont need foundation because i'm young i like how it can give me a more even tone when i have blemishes that haven't gone away).

could this be a reaction to something in the products? have any of you had this happen? I think i have sensitive skin.