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SUMMARY: Para-phenylene diamine is a powerful and well known allergen. Nevertheless PPD is widely used for the making of temporary henna tattoos. It is added to the henna paste and afterwards applied directly onto the skin. This way the popular henna tattoos may cause allergic reactions. We present two patients with allergic reactions due to temporary henna tattoos. Patch testing showed a strongly positive reaction to paraphenylene diamine. People with known reactions to PPD or cross-reacting allergens such as sulfonamides, para-amino benzoic acid, sulfonylureas, dapsone, azo dyes or benzocaine should be especially cautious of black henna tattoo application.

TEMPORARY HENNA TATTOOS - NEW ASPECTS OF ALLERGY TO PARA--PHENYLENE DIAMINE