Why does CryoPen work particularly well on seborrheic keratoses compared to other lesions?

Seborrheic keratoses are benign epidermal growths composed primarily of proliferated keratinocytes that remain confined to the upper layers of the skin. CryoPen is specifically effective because it delivers extreme cold in a controlled and superficial manner, targeting these abnormal epidermal cells without penetrating into the dermis. Unlike lesions that have deeper roots or viral components, seborrheic keratoses respond predictably to cryogenic destruction, making CryoPen an ideal, lesion-specific solution.

What happens at a cellular level when a seborrheic keratosis is frozen with CryoPen?

When CryoPen is applied, the rapid temperature drop causes ice crystals to form inside the keratinocytes that make up the lesion. These crystals disrupt cellular membranes and intracellular structures, leading to irreversible cell death. Blood flow to the lesion is also temporarily disrupted, further preventing cell survival. Over time, the body’s natural healing process removes the non-viable tissue and replaces it with healthy epidermal cells.

Why do seborrheic keratoses lift or peel rather than dissolve after treatment?

Seborrheic keratoses grow outward from the skin surface and have a characteristic “stuck-on” appearance. Because they are not infiltrative and do not integrate deeply with surrounding tissue, once the cellular attachment is destroyed by freezing, the lesion detaches from the skin. Rather than dissolving internally, the treated growth separates and sloughs away as the underlying skin regenerates.

How does CryoPen avoid damaging deeper skin layers beneath seborrheic keratoses?

CryoPen allows precise control over freeze depth, duration, and application area. The cold exposure is brief and localised, ensuring that the freezing effect remains within the epidermis. This protects deeper structures such as collagen fibres, nerve endings, and blood vessels in the dermis, significantly reducing the risk of scarring or textural change.

Why do thicker or “stuck-on” seborrheic keratoses sometimes need longer freeze times?

Heavily keratinised or long-standing seborrheic keratoses develop dense layers of compacted keratin. These thicker lesions act as insulation, requiring a longer or slightly deeper freeze to ensure all abnormal cells are destroyed. Insufficient freezing may leave viable keratinocytes behind, which can slow resolution or require retreatment.

What determines whether a seborrheic keratosis falls off in days versus weeks?

The speed of detachment depends on lesion thickness, surface area, and individual skin turnover rates. Smaller or thinner lesions often shed quickly, while larger or more keratinised growths may take several weeks to fully separate as the skin gradually replaces damaged tissue.

Can CryoPen treat flat and raised seborrheic keratoses differently?

Yes. Flat seborrheic keratoses usually require shorter freeze times because the abnormal cells are closer to the skin surface. Raised lesions, especially those with a waxy or rough texture, need a more sustained freeze to penetrate the thicker keratin layer and reach all affected cells.

Why is seborrheic keratosis removal considered cosmetic but still clinically valuable?

Although seborrheic keratoses are benign, they can trap sweat, oils, and debris, leading to irritation, itching, and recurrent inflammation. Their appearance can also interfere with routine skin monitoring, making it harder to identify new or changing lesions. Removal improves skin comfort, hygiene, and long-term skin assessment.

Does CryoPen treatment affect normal pigment cells around seborrheic keratoses?

CryoPen’s highly targeted delivery limits exposure to surrounding melanocytes. Because the freeze is localised and brief, pigment cells outside the lesion are largely preserved, reducing the likelihood of hypopigmentation or uneven skin tone after healing.

Why do seborrheic keratoses rarely bleed during CryoPen removal?

Seborrheic keratoses are superficial and lack significant vascular supply. CryoPen destroys the lesion without cutting or incising tissue, so blood vessels are not disrupted, resulting in little to no bleeding during or after treatment.

Can seborrheic keratoses regrow after CryoPen treatment?

Once a seborrheic keratosis is completely destroyed, it does not regrow at the same site. However, new seborrheic keratoses may develop elsewhere over time, as their formation is linked to genetics and ageing rather than incomplete treatment.

Why is professional assessment important before freezing seborrheic keratoses?

Some pigmented or textured skin lesions can visually resemble seborrheic keratoses. A professional assessment ensures the lesion is benign and suitable for cryotherapy, reducing the risk of inappropriate treatment and ensuring safe, accurate removal.

Seborrhoeic Keratoses Gravesend

CryoPen Treatment for Suitable, Previously Assessed Lesions

Seborrhoeic keratoses are common, benign skin growths that can develop in adulthood. They can vary considerably in colour, size and texture and may sometimes have a raised, rough or “stuck-on” appearance.

Although seborrhoeic keratoses are benign, some pigmented or unusual-looking skin lesions can resemble other skin conditions.

At Lipo 360, we do not diagnose skin lesions. We may consider CryoPen treatment for suitable seborrhoeic keratoses following consultation and assessment.

If a lesion is new, changing, unusual, bleeding without an obvious cause, has not been previously assessed, or you are unsure of its identity, we may recommend speaking to an appropriate healthcare professional before treatment.

What Are Seborrhoeic Keratoses?

Seborrheic keratoses are common, non-cancerous growths caused by a build-up of ordinary skin cells.

They can vary in appearance and may be skin-coloured, pink, brown or very dark. Some are relatively flat, while others become raised, rough, waxy or crusted.

They commonly develop in adulthood, and some people develop several over time.

Seborrheic keratoses are not infectious and are not the same as viral warts.

Most do not require treatment. However, some people choose to have a suitable lesion treated for cosmetic reasons or because it is in an area where it is regularly rubbed or caught.

Why Is Assessment Important?

Don’t assume every raised, brown, or pigmented skin lesion is a seborrheic keratosis.

Some skin lesions can look similar, and Lipo 360 does not provide a medical diagnosis.

Before considering CryoPen treatment, we will discuss the lesion and assess whether it appears suitable for the treatment we provide.

We may decline treatment or recommend assessment by an appropriate healthcare professional where:

the identity of the lesion is uncertain
the lesion is new or changing
there has been an unexplained change in colour, size or appearance
it is persistently bleeding, sore or otherwise concerning
the lesion has not previously been appropriately assessed, and there is uncertainty about its nature

We will only consider treatment where we are satisfied it is appropriate within the scope of our service.

CryoPen Treatment for Seborrhoeic Keratoses

CryoPen is a handheld cryotherapy device that delivers a controlled application of nitrous oxide to a targeted area of skin.

For suitable seborrhoeic keratoses, the treatment involves applying controlled cold to the lesion.

The treated area may change in appearance following treatment as the skin responds and heals.

The response to treatment varies depending on factors such as the lesion’s size, thickness, and location, as well as individual skin response.

Some lesions may require more than one treatment session, and complete removal cannot be guaranteed.

What Happens During Treatment?

Your practitioner will first discuss the area you would like treated and check that treatment appears appropriate.

If you are suitable to proceed, your practitioner applies CryoPen directly to the targeted lesion for a controlled period.

You may experience sensations such as cold, tingling, stinging or temporary discomfort during treatment.

The length of the appointment and treatment required will depend on the number, size and characteristics of the lesions being treated.

Your practitioner will explain what to expect and provide appropriate aftercare information.

What Can I Expect Afterwards?

The treated area may temporarily become red, swollen, tender or darker following CryoPen treatment.

A blister or crust may sometimes develop as part of the skin’s response to cryotherapy. Allow this to resolve naturally rather than picking or removing it.

Skin pigmentation can change after cryotherapy, and there is also a risk of scarring or other skin changes.

Healing times and treatment responses vary between individuals.

Your practitioner will discuss relevant risks, expected aftercare and whether further treatment may be appropriate.

Is CryoPen Suitable for Everyone?

No. CryoPen treatment is not suitable for every person or every skin lesion.

Suitability depends on the lesion, its location, your skin, medical history and other individual factors.

Treatment may be declined or postponed if there is uncertainty about the lesion or if your practitioner believes further medical assessment is appropriate.

A consultation is therefore required before recommending treatment.

Seborrhoeic Keratoses FAQs

Are seborrhoeic keratoses cancerous?

Seborrhoeic keratoses are benign, non-cancerous skin growths.

However, other skin lesions can sometimes resemble them. If you have a new, changing or unusual lesion, or you are uncertain about what it is, seek appropriate medical assessment rather than assuming it is a seborrhoeic keratosis.

Do seborrhoeic keratoses need to be removed?

Usually, no. Seborrhoeic keratoses are generally harmless, and most do not require treatment.

Some people choose to have a suitable lesion treated for cosmetic reasons or because its position means that it is regularly rubbed or caught.

Can CryoPen remove a seborrhoeic keratosis?

Cryotherapy is one method used to treat suitable seborrhoeic keratoses.

At Lipo 360, CryoPen may be considered following consultation and assessment.

Individual responses vary, and we cannot guarantee complete removal.

Will one treatment be enough?

This varies. The response can depend on factors including the lesion’s size, thickness and location, as well as your individual skin response.

Some lesions may require further treatment.

Can a seborrhoeic keratosis come back?

A treated lesion may recur, and new seborrhoeic keratoses may develop elsewhere.

Treatment therefore does not prevent further seborrhoeic keratoses from developing.

Does CryoPen treatment hurt?

People experience cryotherapy differently.

You may notice cold, tingling, stinging or temporary discomfort while the area is being treated. Your practitioner will explain what to expect before proceeding.

Can CryoPen cause scarring or pigmentation changes?

Skin changes are possible following cryotherapy.

These can include temporary redness, swelling, crusting and changes in pigmentation. Scarring is also a potential risk.

Your practitioner will discuss relevant risks and aftercare with you before treatment.

What if I am not sure the lesion is a seborrhoeic keratosis?

Do not assume that a new or changing skin lesion is a seborrhoeic keratosis.

Lipo 360 does not diagnose skin lesions. If a lesion’s identity is uncertain or it has concerning features, we may recommend assessment by an appropriate healthcare professional before considering treatment.

Arrange a Consultation

If you have a previously assessed seborrhoeic keratosis that you would like to discuss, contact Lipo 360 to arrange a consultation.

We will discuss the area, your medical history and whether CryoPen may be appropriate for you.

Treatment is subject to individual suitability and assessment; results vary, and we can’t guarantee any particular outcome.

England Kent