I have small bumps all behind both ears, i recently applied a solid perfume to that area, and I ve been very stressed at work lately, could that be causing it? Is there any OTC that I should use for it, or will it just go away? It has been about 5 days since they appeared. I am female, age 22, 5 3 and 160 lbs non smoker, non drinker, I take mononessa birth control pills and the occasional advil .