A seborrheic keratosis is a rough dark lesion that very commonly appears with aging. They are benign growths
Seborrheic keratoses are rough lesions that grow on the body. They are skin growths that typically start to appear when people turn 40 years old. A clinical study shows that 100% of people above the age of 50 have had at least one seborrheic keratosis. Although they are typically seen in middle-aged adults, seborrheic keratosis lesions can also be found in 12% of people between the ages 15 and 25. They are more common in Caucasians, and equally common in men and women. They can grow anywhere there is skin, especially on the back.