I also had an allergic reaction to Mac eyeshadow. In the first incident I had bilateral swelling all the way down my teartroughs and in the upper eyelids, redness, itching, and generally felt terrible. The second time, about 2 weeks later when the same eyeshadow was applied the allergic reaction was more severe. I wrote the company to make them aware of this issue. I recommend that anybody that experiences any kind of discomfort with any makeup discontinu immediately. Allergic reactions generally become more severe with repeated exposures. It's your body's way of telling you that this chemical substance or whatever is not good for you