Lichen nitidus.

Lichen nitidus (LN) is a rare inflammatory skin condition characterized by small, shiny, flat-topped papules, commonly affecting children and young adults. Its etiology remains unclear, though immune-mediated pathways are suspected. LN is often asymptomatic, with papules primarily on the trunk, upper limbs, and genitalia. Diagnosis relies on characteristic histopathology, notably a "claw clutching a ball" pattern. Though it often resolves spontaneously, LN may present persistently, sometimes requiring topical treatment. This review highlights LN's clinical, histological, and dermoscopic features, discusses variants and associated systemic conditions, and offers guidance for dermatologists in managing this distinct dermatosis.