What is Dermatosis Papulosa Nigra? Dermatosis papulosa nigra describes the presence of multiple, small, 1-5 mm diameter, smooth, firm, black or dark brown papules on face and neck of black-skinned people. Clinical Features Dermatosis papulosa nigra usually begins in adolescence. The incidence, number and size of lesions increases with age. Lesions occur mainly on the cheeks and forehead but may … Continue reading All You Need To Know About Dermatosis Papulosa Nigra