By Gary M. White, MD

Becker's Nevus

The Becker’'s nevus (BN) is a hyperpigmented and hypertrichotic area that usually develops in adolescence.


A congenital or early onset area of hyperpigmentation and/or hypertrichosis is seen. The upper trunk and/or proximal upper arms in a male is the most common presentation. A fine dermal papular component may occasionally seen and represents hyperplasia of smooth muscle bundles.


Usually no treatment is performed. There has been some success reported with lasers [J Cutan Aesthet Surg. 2009;2:72-80]. For excessive hair, laser hair removal may be considered. Topical flutamide reduced the hypertrichosis in one woman [JAAD Volume 2013;69; e147–e148]. Spironolactone increased breast size in one case of breast hypoplasia.

Additional Pictures

Becker's Nevus Becker's Nevus Becker's Nevus Becker's Nevus


Becker's melanosis before and after CO2 laser. J Cutan Aesthet Surg. 2009 Jul-Dec;2(2):72-80

Topical Flutamide reduced the hypertrichosis for a 22-year-old woman. JAAD Volume 69, Issue 3, Pages e147–e148, September 2013

Breast hypoplasia from Becker's nevus. J Am Acad Dermatology Courtesy of Dr László Török, Kecskemét, Hungary.


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