Chemical Peel Before and After picturesMedium peels often contain higher levels of strong acids. The best candidate for a medium peel is an individual with fair to medium skin. Medium Peels target the epidermis and upper dermis and cause the skin to slough within 5 to 7 days. Immediately after treatment the skin has a red appearance and is occasionally accompanied by swelling. Within a day, the skin turns brown in color and after 3 or 4 days, the skin begins the peeling process.