Pigmented contact cheilitis from dipentaerythritol fatty acid ester

Pigmented cosmetic dermatitis, which was previously known as melanosis faciei feminae, was first recognized in 1973 ( 1). Innumerable patients with this pigmentary disorder presented in 1960s and 1970s in Japan ( 2). After allergen control was performed, the disease became completely preventable and the incidence decreased. However, sporadic cases of this disease continue to be reported in the 1990s and 2000s ( 3, 4), so it is necessary to recognize the cosmetic allergens that produce hyperpigmentation.