Allergic contact dermatitis to white petrolatum

White petrolatum is known for its nonsensitizing and nonirritating properties. Only a few cases of allergic contact dermatitis to white petrolatum have been reported. Although it is a rare event, the finding of contact sensitization to white petrolatum raises the potential problem of its usage of common topical agents or vehicles for patch testing. We herein report a case of allergic contact dermatitis to white petrolatum.