Calluses and corns are a buildup of dead skin that forms along pressure points such as the heels, toes and bony areas of feet. “They’re common if you wear sandals or flip-flops because of the repeated friction of your foot moving around in the shoe,” explains podiatrist Carolyn McAloon, D.P.M., spokesperson for the American Podiatric Medical Association. To eliminate these pesky spots, use a pumice stone or foot file every day after showering and slather on over-the-counter creams that contain lactic acid, like AmLactin, to hydrate and exfoliate skin. Avoid medicated callus and corn remover pads, though, because they can actually burn and further aggravate your skin. For tough cases, your podiatrist can prescribe stronger moisturizing lotions.