Seborrheic keratoses tend to:
- Start as small, rough bumps, then slowly thicken and develop a warty surface.
- Have a waxy, stuck-on-the-skin look.
- Be brown, though they range in color from white to black.
- Range in size from a fraction of an inch to larger than a half-dollar.
- Form on the chest, back, stomach, scalp, face, neck, or other parts of the body (but not on the palms and soles).
- Cause no pain — some itch.
Seborrheic keratoses: Some seborrheic keratoses look like stucco splattered on the skin. Seborrheic keratoses: Like his father, this man saw many of these growths appear on his skin.
Learn more about seborrheic keratoses:
Images used with permission of the American Academy of Dermatology National Library of Dermatologic Teaching Slides.