. A, Candidal infection of the perioral skin caused by use of a petrolatum-based product. The condition started as angular cheilitis, but the patient continuously applied petroleum jelly to the corners of the mouth and perioral skin, sealing moisture into the keratin layer of the epidermis, thereby allowing the candidal organisms to thrive. B, Two weeks after discontinuing the petroleum jelly and using topical iodoquinol with triamcinolone.