Kam Tim Michael Chan and Matthew Ming Wai Ma
Pigmented Contact Dermatitis is an acquired allergic contact dermatitis secondary to certain cosmetics or airborne allergens. Although it is rarely reported in fair skin types and in western countries, it is a significant disease with major psychological burden to patients with dark skinned types. Its exact relationship to Riehl melanosis remains controversial. While its exact aetiology and pathogenesis are still unknown, advances in treatment including oral tranexamic acid, glycyrrhizin compound and laser have been proposed. We report a case of an elderly female histologically confirmed to have Pigmented Contact Dermatitis secondary to hair dyes and hydrocarbon oils responded satisfactory to topical Lignin Peroxidase cream applied over six month duration.