In the absence of successful treatment, hypertrophy (increased tissue mass) of the<unk> s may cause problems later in life, such as loss of function (especially if the<unk>  is near the eye or mouth), bleeding, and increasing disfigurement. Lesions on or near the eyelid can be associated with glaucoma. If the<unk>  is on the face or other highly visible part of the body, its presence can also cause emotional and social problems for the affected person.
Port-wine stain
Forchheimer spots
Bier spots
Elschnig spots
Riehl melanosis
Brushfield spots
Koebner phenomenon
Cameron lesions