Lichen aureus induced by an insect bite

Lichen aureus is an uncommon variant of pigmented purpura and presents itself with a chronic and benign course. Clinically, lichen aureus cases are asymptomatic and are found in the lower limbs, presenting themselves as erythematous, brownish or golden macules and/or papules. Its diagnosis is based on clinical and histopathological findings. The prognosis of lichen aureus is generally good. A 34-year-old Filipino male presented himself with a single itchy skin lesion on the right leg present for three months. The lesion started as a small, round, reddish to brownish area and then increased in size over time. A history of an insect bite on the same site was reported. An examination revealed a single annular, golden to brownish macule on the right leg. Based on this clinical and histopathological feature, the skin lesion was diagnosed as lichen aureus. The comprehension of the pathogenesis of lichen aureus is essential for knowing its risk factors.