I never knew allergies could cause dark circles under the eyes until a few years ago when my allergist wanted to retest my allergies so I had to stop all my antihistamines for 24 hours. "Good gracious," said Dr. Ann, "she looks like she's got two black eyes, poor thing, Justi, look what we've done to her!" I hadn't even seen a mirror or payed enough attention to notice. But Kimmie, I guess we pale white girls just show them up better, too. Good luck on finding something to cover them up, I would never dare, as I am horribly allergic to almost all make-up - yes, even Clinique!