Adnexal polyp of neonatal skin is a small, skin-colored papule that occurs most frequently on the areola of the nipple in newborns. The incidence is reported to be 0.7% in the Czech Republic and 4% in Japan. The frequency of adnexal polyps in other ethnic groups have not been studied.

Adnexal polyps are usually single, but the presence of more than one has been reported. They usually become desiccated and brown before falling off spontaneously within a few days of life, but rarely they can persist until early childhood, up to the age of 7. They are not associated with underlying syndromes or diseases.