Allergic contact dermatitis to temporary tattoo by p-phenylenediamine.

: Temporary tattoos are widely applied today all over the world. The tattoo makers explain that they use "natural henna paint," although in fact they use "black henna," which includes a mixture of many substances, among them p-phenylenediamine (PPD). There have recently been many reports of allergic contact dermatitis because of temporary tattoo with PPD sensitization. We are adding a new case of temporary tattoo with black henna with an extensive reaction, in which a 12-year-old white boy showed contact dermatitis from PPD, followed by cutaneous eruption after corticosteroid topical treatment.