Paraphenylenediamine ingredient possibly contributes to granuloma formation in inflammatory tattoo

Tattoos are used as world‐wide cosmetic practice and an exotic self‐expression form in some social groups. In the black henna tattoo, to darken the color, it occasionally contains hair dyes, as represented by paraphenylenediamine (PPD)8–10, which is well known as contact allergen. We report an erythematous indurated eruption congruous with a dermally injected permanent tattoo in a patient who had contact dermatitis to PPD.