Seborrheic Keratosis: A Comprehensive Guide
Medically reviewed by Andre Stone | MD, University of Pittsburgh School of Medicine on July 24th, 2026.
Published on April 9th, 2026. Updated on August 24th, 2026.
Key Takeaways
Seborrheic keratoses are common, non-cancerous skin growths that appear as waxy, scaly patches
They typically develop after age 40 and become more frequent with aging
These growths are harmless but can be mistaken for more serious skin conditions
Treatment is usually not necessary unless the growths become irritated or cosmetically bothersome
Professional evaluation helps distinguish them from potentially cancerous skin lesions
Overview
Seborrheic keratosis is one of the most common non-cancerous skin growths in adults. These waxy, scaly patches appear on the skin surface and can range from light tan to dark brown or black. They often look like they've been "pasted on" the skin.
Most people develop seborrheic keratoses as they age. Seborrheic keratoses become increasingly common with age, and many people have at least one by age 70. While they can appear anywhere on the body, they're most common on the chest, back, shoulders, and face.
These growths are completely harmless and don't turn into cancer. However, they can sometimes be confused with more serious skin conditions. That's why it's important to have any new or changing skin growths evaluated by a healthcare provider.
The number of seborrheic keratoses you develop can vary greatly. Some people get just a few, while others develop dozens over their lifetime. They grow very slowly and don't cause pain or other health problems. Many people don't even notice them until a doctor points them out during a routine exam.
Symptoms & Signs
Seborrheic keratoses have distinctive characteristics that help distinguish them from other skin conditions. The appearance can vary significantly from person to person.
Primary Symptoms
Waxy, scaly, or slightly raised patches that appear "stuck on" the skin
Color ranging from light tan to dark brown or black
Round or oval shape with a rough, warty surface texture
Gradual increase in size and thickness over time
When to Seek Care
Watch for changes in existing growths or new symptoms. Any growth that becomes painful, bleeds, or changes rapidly in appearance needs medical attention. Most seborrheic keratoses stay the same size for years, so sudden changes are worth reporting. Itching can result from clothing rubbing against a growth, but persistent itching or irritation should be evaluated by a healthcare provider.
When to Seek Immediate Care
Seek prompt medical evaluation if a skin growth begins bleeding without an obvious injury or changes rapidly in color, shape, or size.
Causes & Risk Factors
The exact cause of seborrheic keratosis remains unknown. Research suggests they may result from genetic factors combined with aging processes in the skin.
Age
Most common after age 40, increasing frequency with advanced age
Genetics
Strong family history increases likelihood of developing multiple growths
Lifestyle
Sun exposure may contribute but is not the primary factor
Other Conditions
Fair skin types may be slightly more susceptible
Continue Learning
Related articles you might find helpful
Diagnosis
Healthcare providers can usually identify seborrheic keratoses through visual examination. The distinctive appearance and characteristics make diagnosis relatively straightforward in most cases.
Medical History & Physical Examination
Your doctor will ask about when the growth first appeared and whether it has changed over time. They'll examine the growth's color, texture, and borders. The provider will also check for other similar growths on your body, as people often develop multiple seborrheic keratoses.
Diagnostic Testing
Dermoscopy examination using a special magnifying tool to view skin details
Biopsy if the growth has unusual features or recent changes
Photography to document appearance for future comparison visits
Get Skin Care Relief Today
Learn More
Treatment Options
Treatment is typically not necessary for seborrheic keratoses since they're harmless. However, removal may be considered for cosmetic reasons or if the growths become irritated.
Conservative Treatments
Observation and monitoring for any changes in appearance
Gentle skin care to prevent irritation from clothing or jewelry
Moisturizing to reduce dryness and potential itching around the growth
Advanced Treatments
Cryotherapy (freezing) with liquid nitrogen for quick removal
Electrodesiccation and curettage (scraping) for thicker growths
Shave excision for raised lesions that catch on clothing
Skin growths with concerning features need professional evaluation before treatment.
Cryotherapy is a commonly used removal method because it is quick, but it can cause blistering, skin-color changes, incomplete removal, and, less commonly, scarring. The procedure feels cold but usually doesn't hurt much. Most people see the growth fall off within a few weeks after treatment. Some growths may need more than one treatment to be completely removed, especially if they're thick or large.
Living with the Condition
Most people with seborrheic keratoses live normal lives without any complications. The growths are purely cosmetic concerns for most individuals.
Daily Management Strategies
Keep the skin clean and dry around the growths. Avoid scratching or picking at them, which can cause bleeding or infection. Use gentle, fragrance-free moisturizers if the surrounding skin becomes dry. Choose clothing that doesn't rub against larger growths to prevent irritation.
Many people wear loose clothing to reduce rubbing. If a growth is cosmetically bothersome, a healthcare provider can discuss removal options. If a growth is in a spot where you shave or wash regularly, be extra careful not to nick it. Protecting growths from trauma helps prevent the rare chance of infection.
Exercise & Movement
No exercise restrictions are necessary. However, be mindful of activities that might cause friction against the growths. Swimming and other water activities are perfectly safe. If growths are in areas where athletic equipment might rub, consider protective padding.
You can participate in all sports and physical activities normally. There's no need to avoid sweating or being active. Seborrheic keratoses won't get worse from exercise or movement. Just keep the areas clean and dry after sweating to prevent skin irritation.
Prevention
There is no proven way to prevent seborrheic keratoses. General skin care and sun protection remain helpful for overall skin health.
Practice good sun protection with broad-spectrum sunscreen and protective clothing
Maintain healthy skin through gentle cleansing and regular moisturizing
Avoid picking or scratching at existing growths to prevent complications
Ask a healthcare provider how often you need a skin examination based on your personal risk factors, and seek evaluation for new or changing growths.
Maintaining healthy skin-care habits supports overall skin health, even though it cannot prevent seborrheic keratoses.
Protecting your skin from sun damage is always a good idea for many reasons, even if it doesn't prevent seborrheic keratoses. Wearing sunscreen with SPF 30 or higher every day helps protect against other types of skin damage. Wearing hats and seeking shade during peak sun hours offers extra protection. Regular skin checks help you notice any new growths early so your doctor can evaluate them.
Frequently Asked Questions
No, seborrheic keratoses are not contagious. They cannot be spread from person to person through contact. They develop due to genetic factors and aging, not from infections or viruses.
Seborrheic keratoses themselves do not become cancerous. However, they can sometimes be confused with melanoma or other skin cancers. That's why professional evaluation of any changing skin growth is important.
These growths typically persist once they develop. They may slowly grow larger over time but rarely disappear without treatment. Some may become less prominent with age, but complete resolution is uncommon.
Removal costs vary depending on the method used and your location. Insurance may cover removal if the growth is irritated or causing problems. Cosmetic removal is usually not covered by insurance plans.
Do not attempt to remove these growths yourself. Home removal can cause infection, scarring, or bleeding. Additionally, what appears to be a seborrheic keratosis could be another type of skin lesion requiring different treatment approaches. Professional evaluation and treatment help ensure that the lesion is identified correctly and removed safely.
Still have questions?
Consult with a healthcare professional for personalized advice.