Seborrheic Keratoses (SKs) are very common, noncancerous skin growths that frequently develop in adults and tend to increase in number with age. These lesions often present as slightly elevated spots that may look waxy, rough, or scaly. Their color can vary widely—from light tan to dark brown or even black—and they may have a “stuck-on” appearance, as if sitting on top of the skin’s surface. SKs are most often found on the trunk, face, neck, or shoulders, though they can appear anywhere except the palms and soles.
Although seborrheic keratoses are completely harmless and pose no health risk, their appearance can sometimes resemble other skin conditions, including melanoma and other forms of skin cancer. For this reason, any new or changing growths should be professionally evaluated to ensure an accurate diagnosis.
These lesions usually do not cause pain, but they can become bothersome for some individuals. In certain cases, SKs may itch, become irritated by clothing, or catch on jewelry, leading to discomfort. Others may simply find them cosmetically undesirable, particularly when they develop on visible areas such as the face or neck.
When treatment is desired, options may include cryotherapy (freezing), curettage (gentle scraping), electrosurgery, or laser therapy. These procedures are quick, safe, and effective, with minimal recovery time. While new lesions can continue to appear with age, removing existing seborrheic keratoses can improve both comfort and cosmetic appearance.
Signs & Symptoms
Recognizing the characteristics of SKs can help differentiate them from other growths:
- Waxy, “stuck-on” growths that may be flat or raised with a scaly surface; colors range from light tan to dark brown or black.
- Most commonly found on the chest, back, head, or neck, but they can occur almost anywhere except the palms and soles.
- Usually painless but may itch, rub against clothing, or become irritated.
- SKs often increase in number with age and may grow larger over time. Despite their appearance, they remain benign and do not turn into cancer.
Causes & Risk Factors
The exact cause of SK is unknown, but factors that may contribute include:
- Aging: Most common in individuals over 40.
- Genetics: A family history of SKs can increase likelihood and number.
- Skin Type: They occur across all skin tones but may vary in presentation.
Treatment Options
While treatment is not medically required, many people choose removal for cosmetic reasons, irritation, or diagnostic clarity. Treatment options may include:
- Cryotherapy: Freezing the lesion with liquid nitrogen.
- Electrodessication: Using electrical energy to safely remove the growth.
A skin biopsy may also be performed to rule out any risk of skin cancer.
Conditions & Concerns Addressed
We support patients who seek care for:
- Benign but bothersome or irritated growths
- Cosmetic removal of visible or numerous SKs
- Evaluation of uncertain lesions to ensure they are not precancerous or cancerous