Congenital melanocytic nevi.

Congenital nevi are characterized by the appearance of pigmented areas that range in size, shape, surface texture, and hairiness. In most cases, the nevus remains stable and benign, but because of possible malignant transformation, nevi are often excised. In this case, a young boy was born with a hairy nevus below his lip extending inferiorly down the left side of his chin and upper neck. After two surgical excisions, the wound healing process was interrupted when his incision wound was split while jumping on his bed. With the professional assistance of occupational therapists, the scar should heal in an esthetically pleasing manner.