Seborrheic Keratosis on the Scalp:

Causes, Symptoms & Treatment Options

What Is Seborrheic Keratosis?

Seborrheic keratosis (SK) is one of the most common noncancerous skin growths in adults. These benign lesions can appear virtually anywhere on the body — and the scalp is one of the most frequent sites, especially as we age. Despite their sometimes alarming appearance, seborrheic keratoses are completely harmless. However, when they develop on the scalp, they can be itchy, easily irritated by combing or styling, and difficult to self-examine.

At My Skin in St. Petersburg and Bradenton, we regularly evaluate scalp lesions to confirm diagnoses and recommend the best course of action — whether that means watchful waiting or professional removal.

Key Fact

Seborrheic keratoses are not contagious, not caused by sun damage, and are not pre-cancerous. They arise from the outer layer of skin (the epidermis) and have no known link to skin cancer.

Causes & Risk Factors

The exact cause of seborrheic keratosis is not fully understood, but several factors are strongly associated with their development:

• Age — SKs are rare before age 30 and become increasingly common after 50. Nearly all adults over 70 have at least one.

• Genetics — A family history of seborrheic keratoses significantly raises your likelihood of developing them.

• Hormonal changes — Some evidence suggests that hormone fluctuations, including pregnancy, can trigger new lesions.

• Skin type — Fair-skinned individuals develop SKs more often, though they occur across all skin tones.

• Friction & irritation — Areas of repeated friction, such as the hairline, can be prone to SK formation.

Unlike many other skin conditions, seborrheic keratosis is not caused by sun exposure — which distinguishes it from actinic keratosis. It is also not caused by bacteria or viruses.

What Does Scalp Seborrheic Keratosis Look Like?

Scalp SKs can vary widely in appearance, which is one reason they're sometimes mistaken for other conditions. Common characteristics include:

• Waxy, stuck-on appearance - as if a piece of wax or dried skin has been glued to the scalp

• Color ranging from pale tan to dark brown or black

• Rough, scaly, or warty surface texture

• Size from a few millimeters to several centimeters

• Slightly raised or flat profile

• Occasional itching, tenderness, or bleeding when snagged by a comb or fingernail

When to Seek Immediate Evaluation

If a growth on your scalp bleeds easily, changes rapidly in shape or color, has irregular borders, or appears inflamed and ulcerated, have it evaluated promptly. These features can indicate a more serious condition, including skin cancer. Our team offers comprehensive skin cancer examinations to give you peace of mind.

How Is Seborrheic Keratosis Diagnosed?

An experienced medical dermatology provider can typically diagnose seborrheic keratosis through a clinical examination. The characteristic stuck-on waxy texture and the presence of comedo-like openings (tiny pores visible on the surface) are usually enough for a confident diagnosis.

In cases where the lesion's appearance is atypical — particularly when it resembles a melanoma or squamous cell carcinoma — a skin biopsy may be recommended. A biopsy involves removing a small tissue sample for laboratory analysis, a procedure performed routinely at our surgical dermatology clinic in St. Pete and Bradenton.

Dermoscopy

Many dermatology providers use dermoscopy — a handheld tool with magnification and light — to examine the microstructure of scalp lesions without cutting into the skin. This allows for more precise differentiation between benign SKs and malignant growths.

Treatment Options for Scalp Seborrheic Keratosis

Because seborrheic keratoses are benign, treatment is not medically necessary. However, many patients choose removal due to:

• Persistent itching or irritation

• Frequent snagging during hair washing or styling

• Cosmetic concerns

• Uncertainty about the diagnosis

Cryotherapy (Liquid Nitrogen)

One of the most common removal methods, cryotherapy uses liquid nitrogen to freeze and destroy the lesion. The frozen tissue sheds over 1–2 weeks. This technique works well for flat or slightly raised SKs and leaves minimal scarring.

Electrodesiccation & Curettage

This two-step procedure uses an electric current to dry out the lesion, followed by gentle scraping (curettage) to remove the tissue. It is fast, effective, and typically performed under local anesthetic.

Shave Excision

For thicker or more prominent scalp lesions, a shave excision may be preferred. The growth is shaved flush with the skin surface using a surgical blade. This also provides a tissue sample for histological confirmation. Our surgical dermatology services are designed to achieve the smallest possible incision with minimal scarring.

Laser Therapy

Ablative laser treatments (such as CO2 or Er:YAG) can vaporize seborrheic keratoses with high precision. Laser removal is particularly useful for multiple lesions or lesions in difficult-to-access scalp areas.

Scalp SKs that are frequently irritated tend to become inflamed, darker, and larger over time. Addressing them early with professional removal is often easier and more comfortable than waiting until they grow significantly larger.

Can You Prevent Seborrheic Keratosis?

There is currently no proven method to prevent seborrheic keratoses. Because they appear to have a strong genetic component, even people who take excellent care of their skin may develop them. Maintaining overall skin health through regular dermatology check-ups and prompt evaluation of new or changing lesions remains the best strategy for long-term skin wellness.

Seborrheic Keratosis vs. Skin Cancer: How to Tell the Difference

This is one of the most common concerns patients bring to our office. The good news is that SKs are reliably distinguishable from skin cancers — but the key word is reliably. Self-diagnosis is unreliable because some melanomas can closely mimic seborrheic keratoses in their early stages.

Here is a general comparison:

• Seborrheic Keratosis: Waxy pasted-on look; well-defined edges; rough, cerebriform surface; grows slowly over years; multiple lesions are common.

• Melanoma: Irregular shape and border; uneven coloration with shades of black, brown, red, or white; can bleed or ulcerate; tends to grow rapidly.

• Squamous Cell Carcinoma: Rough, scaly patch that may bleed; sometimes tender; can occur in sun-exposed scalp areas, especially in patients with hair loss.

When in doubt, always have your scalp examined by a professional. Our team at My Skin offers thorough skin cancer screenings at both our St. Petersburg and Bradenton locations.

Living With Scalp Seborrheic Keratosis

For patients who choose not to remove their SKs, here are practical tips for day-to-day management:

• Use a wide-tooth comb and be gentle around lesion sites to reduce irritation

• Avoid picking or scratching, which can lead to bleeding or secondary infection

• Choose mild, fragrance-free shampoos to minimize scalp irritation

• Periodically inspect your scalp (with a mirror and good lighting, or with a partner's help) for changes in size, shape, or color

• Schedule regular skin examinations so a professional can monitor lesions over time

Frequently Asked Questions

Is seborrheic keratosis on the scalp dangerous?

No. Seborrheic keratoses are entirely benign and carry no risk of becoming cancerous. However, because some malignant lesions can resemble SKs, it's important to have any new, changing, or unusual scalp growth evaluated by a dermatology provider.

• Will seborrheic keratoses on my scalp go away on their own?

Rarely. In most cases, SKs persist indefinitely once they appear. Occasionally a lesion may fall off after significant irritation, but new ones can continue to form with age.

Does insurance cover seborrheic keratosis removal?

Removal is typically considered cosmetic and may not be covered by insurance unless the lesion is causing significant symptoms (itching, bleeding) or there is diagnostic uncertainty. My Skin accepts most major insurances for surgical dermatology procedures. View our accepted insurances or explore financial options on our website.

Can I remove scalp seborrheic keratosis at home?

We strongly advise against attempting home removal. Over-the-counter products are not proven effective for scalp SKs, and picking or scraping the lesion can cause bleeding, infection, or scarring. Please consult a qualified dermatology provider before attempting any removal.

How do I schedule a skin exam at My Skin St. Pete or Bradenton?

You can easily book an appointment online, or call our St. Pete office at (727) 295-7223 or our Bradenton office at (941) 330-5805. We offer 30-minute appointments and accept Medicare, most commercial insurances, and self-pay.

When to See a Dermatology Provider

While seborrheic keratoses are almost always benign, the scalp is a site many people — and even some healthcare providers — overlook during routine skin checks. Hair can obscure lesions that are growing or changing, making the scalp a location where diagnoses are sometimes delayed.

We recommend seeing a dermatologist promptly if you notice any scalp growth that:

• Has appeared suddenly or changed quickly

• Is asymmetric, has irregular borders, or contains multiple colors

• Bleeds without injury

• Is painful, tender, or persistently itchy

• Has been present since childhood (congenital nevi require specialist monitoring)
  

At My Skin, founded by Leah Michel, APRN FNP-BC, every patient receives individualized attention in a supportive, unhurried environment. Whether you need a routine skin cancer examination, a surgical removal, or simply want expert guidance on monitoring your scalp, we are here to help at both our St. Petersburg and Bradenton offices.

Ready to Get Your Scalp Checked?

Our board-certified dermatology provider takes time with every patient — 30-minute appointments, personalized care, and expert evaluation across St. Pete and Bradenton, FL.

St. Pete: (727) 295-7223

Bradenton: (941) 330-5805