Seborrheic keratosis is a benign skin growth that many people get with age. Causes include genetics and sun exposure. Seborrheic keratosis may range in color from white to black, though most are brown. They can be big or small, rough or smooth. If the appearance of seborrheic keratoses bothers you, doctors can remove it by freezing, cutting, or burning it off. Follow the links below to find WebMD's comprehensive coverage about how seborrheic keratosis is caused, what it looks like, how to treat it, and much more.