Beauty products have never been more advanced. But as people layer them up, experts have seen a rise in perioral dermatitis. What is the too-much-skincare rash, and what can you do about it? Beauty products have never been more advanced. But as people layer them up, experts have seen a rise in perioral dermatitis. What is the too-much-skincare rash, and what can you do about it? The Guardian’s journalism is independent. We will earn a commission if you buy something through an affiliate link.