With the ability of retinoids to defeat acne and wrinkles, however, has come with their reputation for painful side effects such as peeling, flaking, redness, sensitivity to sunlight, irritation, and, for some skin types, hyperpigmentation. Evan Rieder, a New York-based dermatologist and psychiatrist at NYU Langone, considers retinoid education as vital as the products themselves. “I have a photo from my sophomore dance in high school where my skin literally falls off my face using too much Retin-A to treat my acne” because he didn’t get the right information, he says . “So part of this is the dermatologists’ fault. We need to give people the right information on how to safely and tolerably introduce a retinoid. This means knowing what retinoid strength to start with and how often to apply.