What are the complications of pigmented birthmarks?
Some complications of pigmented birthmarks can include psychological effects in cases in which the birthmark is prominent. Pigmented birthmarks also can pose an increased skin cancer risk.
A doctor should check any changes that occur in the color, size, or texture of a nevus or other skin lesion. See a doctor right away if there is any pain, bleeding, itching, inflammation, or ulceration of a congenital nevus or other skin lesion.