A common noncancerous skin condition that appears as a solo or constellation growth, seborrheic keratosis typically has a rounded shape with a waxy texture. Diameter can vary from miniscule to more than 1 inch. With a color range that goes from light tan to black, seborrheic keratosis can resemble flesh moles. These growths typically show up on the face, chest, shoulders, or back. They can sometimes be itchy.