Seborrheic Keratoses
Symptoms
Seborrheic keratoses are benign, wart-like skin growths that appear tan, brown, or black. They often have a waxy or “stuck-on” appearance. Common on the chest, back, face, or scalp, they may be flat or raised. While usually painless, they can become itchy or irritated, especially if rubbed by clothing. Size can range from a few millimeters to several centimeters. They tend to increase in number with age. Rarely, they may mimic skin cancer in appearance. Most people develop multiple lesions over time.
Cause
The exact cause is unknown, but aging and genetics play a significant role. They are not caused by viruses and are not contagious. Sun exposure may contribute to where they appear, though they can also form in sun-protected areas. People with a family history are more likely to develop them. They are more common after age 50. Hormonal changes or friction may also contribute. Certain gene mutations have been linked in research.
Treatment
Because seborrheic keratoses are benign, treatment is optional and usually for cosmetic or comfort reasons. Removal options include cryotherapy (freezing), electrosurgery, curettage, or laser therapy. FDA-approved topical hydrogen peroxide (Eskata®) may be used for raised lesions on the face. These procedures are quick and performed in-office. Removal is generally not covered by insurance unless the lesion is symptomatic or suspicious for malignancy. Treated areas may form scabs that heal over 1–2 weeks. New lesions may still appear over time.
Dr. Beth Schulz-Butulis
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