Lichen nitidus is a rare, non-cancerous, inflammatory skin condition. It causes tiny, raised, itchy bumps (papules) on the skin, usually on the arms and legs. These papules typically appear in clusters. Lichen nitidus most often occurs in children and young adults.
The cause of this disorder isn't known. But it may be associated with another inflammatory skin condition called lichen planus. A doctor can confirm a diagnosis of lichen nitidus by:
Treatment is usually with prescription corticosteroid cream or ointment. Over-the-counter medications may offer some relief, but often aren't effective.