How To Tell If You’re Over-Exfoliating Penzi acknowledged that it can be confusing to know which products to use, how often to use them and how to layer them with other products. Exfoliants usually include common ingredients like glycolic acid, lactic acid and mandelic acid, in addition to traditional physical exfoliants (think old-school “scrubs”). Another way you might be inadvertently over-exfoliating is by using too much product or attempting to exfoliate on top of an already disrupted skin barrier.  The effects of over-exfoliation can vary from person to person. Often, “patients will experience some degree of redness, dryness, flaking and itching,” Penzi said. Someone with over-exfoliated skin might experience a burning or stinging sensation when applying routine skin care products or an increase in acne breakouts. In more severe cases, there could even be areas of raw, broken down and eroded skin. When it comes to treating over-exfoliated skin, less is more.…