Dematosis Papulosa Nigra (DPN): Causes, Symptoms & Treatment

Dermatosis papulosa nigra (DPN) is a benign cutaneous condition of multiple 1–5 mm dark brown/black papules on the face, neck, upper trunk. Predominantly affects Fitzpatrick skin types IV–VI; onset in adolescence, increases with age.

Etiology

• Genetic predisposition (autosomal dominant with variable penetrance).
• UV exposure may exacerbate.
• Histology: seborrheic keratosis-like (hyperkeratosis, acanthosis, horn cysts).

Clinical Features

• Asymptomatic, non-pruritic.
• Cosmetic concern primary driver for treatment.
• Not premalignant.

Treatment Options (Cosmetic)

• Electrodesiccation / hyfrecation: most common, low scarring risk if superficial.
• Cryotherapy: liquid nitrogen; hypopigmentation risk in dark skin.
• Laser: Nd:YAG 1064 nm, KTP 532 nm, CO₂ fractional—precision, less dyspigmentation.
• Scissor excision / snip: for pedunculated lesions.

Sun protection may slow new lesion development. No medical therapy required.