Moles are darker than the rest of the skin. Most moles are a few mm in diameter and usually grow as the child is growing.
A normal mole has a diameter of less than 0,5 cm, normal color on all of its size and clear border. Congenital moles have anomalous surface and darker color than the acquired ones.
They also carry dark, rough hair. Congenital moles usually grow as the child is growing. Dysplastic moles are somewhat more likely to become malignant. Usually these moles a diameter of more than 0,5 cm, many colors and irregular border. You and the doctor must monitor these moles.