International Journal of Clinical & Experimental Dermatology Volume 2 | Issue 1 | 1 of 2 Int J Clin Expl Dermatol, 2017 Contact Dermatitis Due To A Henna Tattoo: A Case Report Case Report Sandra Nora González-Díaz * , Alejandra Macias Weinmann, Barbara Elizondo Villarreal, Cindy Elizabeth de Lira Quezada, Rosa Ivett Guzmán Avilán and Rosalaura Virginia Villarreal González University Hospital “Dr. José Eleuterio González” Regional Center of Allergy and Clinical Immunology. Monterrey, Nuevo León, México. * Corresponding author Sandra Nora González-Díaz, University Hospital “Dr. José Eleuterio González” Regional Center of Allergy and Clinical Immunology. Monterrey, Nuevo León, México. Tel: 01 81 83462515, E-mail: sgonzalezdiaz@yahoo.com. Submitted: 26 Aug 2017; Accepted: 09 Oct 2017; Published: 15 Oct 2017 Introduction Allergic contact dermatitis is a late hypersensitivity reaction caused after the skin is exposed to a specifc allergen [1]. The reaction starts with a sensitization phase in which the allergic skin reaction is acquired after being in contact with the allergen. The repeated exposure causes skin infammation, initiating the elicitation phase [1]. The dose and amount of time exposed are the most important exogenous factors for the development of sensitization [1]. In recent years, temporary henna tattoos have become very popular in children and adults.Henna pigment is obtained from the Lawsonia inermis plant which belongs to the Lythraceae family [2]. The original henna ink isa dark green powder made from the leaves of the plant and commonly used for hair dyes and body tattoos [2]. When it comes in contact with the skin, the color tone turns orange- brown [3]. However the organic compound, p-phenylendiamine (PPD) which is a strong sensitizer,is frequently added to the henna pigment to make it darker [4]. Case report A 13 year old patient with a personal history of asthma and allergic rhinitis with immunotherapy for sensitization to Dermatophagoides farinae and Dermatophagoides pteronyssinuswho presented since one week prior to consultation,skin lesions consisting of pruritic erythematous papules on his right forearm 3 days after applying a henna tattoo. During the physical examination, the skin lesions were marked in the shape and defnition of the tattoo and mild desquamation was observed. Skin patch tests (Bial Aristegui Standard Contact Dermatitis Panel, Spain) were applied with positive results to p-phenylendiamine 1% with 2++ (strong positive reaction with vesicular erythema, infltration and papules) in the frst reading 48 hours later. The second reading was performed upon 96 hours of applying the tests, fnding a 3 +++ (extreme positive reaction with intense erythema and infltration, coalescing vesicles, bullous reaction) result and confrming it 7 days later. The patient was treated with a medium potency topical corticosteroid, mometasone 0.1% and cetirizine 10 mg twice a day for 7 days showing resolution of his skin lesions and symptoms. Abstract Allergic contact dermatitis is a late hypersensitivity reaction caused after the skin is exposed to a specifc allergen. Temporary henna tattoos have become very popular in children and adults.The organic compound, p-phenylendiamine (PPD) is frequently added to the henna pigment to make it darker. A 13 year old patient with a personal history of asthma and allergic rhinitis with immunotherapy for sensitization to Dermatophagoides farinae and Dermatophagoides pteronyssinus who presented since once week prior to consultation,skin lesions consisting of pruritic erythematous papules on his right forearm 3 days after applying a henna tattoo. During the physical examination, the skin lesions were marked in the shape and defnition of the tattoo and mild desquamation was observed. Skin patch tests (Bial Aristegui Standard Contact Dermatitis Panel, Spain) were applied with positive results to p-phenylendiamine 1% with 2++ (strong positive reaction with vesicular erythema, infltration and papules) in the frst reading 48 hours later. The second reading was performed upon 96 hours of applying the tests, fnding a 3 +++ (extreme positive reaction with intense erythema and infltration, coalescing vesicles, bullous reaction) result and confrming it 7 days later. The patient was treated with a medium potency topical corticosteroid, mometasone 0.1% and cetirizine 10 mg twice a day for 7 days showing resolution of his skin lesions and symptoms. Temporary henna tattoos have been associated with a variety of infammatory skin reactions. ISSN: 2476-2415