What Are Seborrheic Keratoses?
Seborrheic keratoses (pronounced seb-o-REE-ik ker-uh-TOE-sees) are non-cancerous skin growths that usually appear in adulthood, often after age 50. They can vary in color—from light tan to dark brown or even black—and typically have a waxy or scaly, "stuck-on" appearance.
These growths can show up almost anywhere on the body, but they’re most commonly found on the chest, back, shoulders, face, or scalp.
Key Characteristics
Texture: Waxy, rough, or scaly surface
Shape: Round or oval, often raised
Color: Tan, brown, gray, or black
Size: A few millimeters to over an inch in diameter
Sensation: Usually painless, but can become itchy or irritated
They may appear singly or in clusters, and while they might look concerning, they are not contagious or cancerous.
What Causes Them?
The exact cause of seborrheic keratoses isn't fully understood, but they are thought to be related to:
Aging: Most people develop them later in life
Genetics: They tend to run in families
Sun exposure: May play a role in their development
They are not caused by a virus and do not stem from skin cancer, though they can sometimes resemble it.
When Should You See a Doctor?
While seborrheic keratoses are generally harmless, you should seek medical evaluation if you notice:
Rapid changes in size, shape, or color
Bleeding, pain, or persistent itching
Growths with irregular borders or multiple colors
Any new skin lesion that looks unusual
A dermatologist can usually diagnose seborrheic keratoses with a visual exam. In some cases, a biopsy may be done to rule out skin cancer.
Treatment Options
Since seborrheic keratoses are benign, treatment is not medically necessary unless they cause discomfort or cosmetic concern. Removal options include:
Cryotherapy (freezing with liquid nitrogen)
Curettage (scraping off the lesion)
Electrosurgery (burning with electric current)
It's important not to try removing them at home, as improper removal can cause scarring or infection.
Living With Seborrheic Keratoses
Having seborrheic keratoses is very common, especially with age. While they may be bothersome, aesthetically or physically if irritated, they are not dangerous. Regular skin checks and sun protection are still recommended, as people with seborrheic keratoses are also at risk for other skin conditions, including skin cancer.
If you have further questions or would like to schedule an appointment with a dermatologist please give us a call at 865-545-0900 or contact us by filling out our appointment request and we’ll reach out to you within a business day.
