Cryotherapy (liquid nitrogen) is the most widely used treatment for seborrheic keratosis, with a success rate around 96.6% and minimal aftercare. But the “best” option depends on the size, location, and number of your growths, plus whether cosmetic outcome or convenience matters most to you. Several effective methods exist, from in-office procedures that take seconds to newer topical treatments you can discuss with a dermatologist.
Cryotherapy: The Most Common Choice
Liquid nitrogen is the go-to for most dermatologists treating seborrheic keratoses. The procedure involves spraying or dabbing the extremely cold liquid directly onto the growth for 10 to 15 seconds, sometimes repeating one more freeze-thaw cycle for thicker lesions. Thin, flat growths may need only 5 to 10 seconds. Most people need just one treatment session, and the overall success rate in clinical studies is about 96.6%.
The tradeoff: cryotherapy is more painful in the moment than some alternatives. You may feel a burning sensation for up to 24 hours afterward, and a blister often forms within one to two days. The treated area scabs over in 7 to 10 days, at which point you can gently exfoliate the scab with a damp washcloth. One downside is that cryotherapy leaves behind residual lesion tissue more often than curettage does, meaning a second treatment is occasionally needed.
In head-to-head comparisons, most patients still preferred cryotherapy over curettage (scraping) because wound care is simpler. This preference held even though patients rated cryotherapy as more painful during the procedure itself.
Curettage and Shave Removal
Curettage uses a small, spoon-shaped instrument to scrape the growth off the skin’s surface after numbing the area. Shave excision works similarly, using a blade to shave the lesion flush with the surrounding skin. Both methods remove more tissue than cryotherapy, which means they’re less likely to leave residual growth behind. They also give your dermatologist a tissue sample to examine under a microscope if there’s any uncertainty about the diagnosis.
The cosmetic picture is a bit different from cryotherapy. Curettage tends to cause more redness at the six-week mark and has a greater tendency to leave a lighter-colored (hypopigmented) scar over the long term. Despite this, blinded physician ratings found statistically significant cosmetic differences between the two techniques at both early and late follow-up, though patients themselves didn’t perceive a major difference. If your growths are on the trunk or arms, cryotherapy is generally preferred. For lesions on the face or other visible areas where precision matters, shave removal may give your dermatologist more control.
Laser Ablation
Erbium-YAG laser treatment vaporizes the growth layer by layer with high precision. In a study comparing it directly to cryotherapy in 42 patients, every single lesion treated with the laser cleared completely after one session, a 100% healing rate, compared to 68% for cryotherapy after the first treatment. That’s a striking difference.
Laser treatment is particularly useful for multiple growths in cosmetically sensitive areas because the depth of tissue removal can be finely controlled. The downside is cost and availability. Not every dermatology practice has a laser, and the procedure is typically more expensive per lesion. It’s worth asking about if you have numerous growths on your face or neck and want the best single-session clearance rate.
Topical Hydrogen Peroxide Solution
A prescription-strength 40% hydrogen peroxide solution (much stronger than the drugstore kind) is the only FDA-approved topical treatment specifically for seborrheic keratoses. Applied by a healthcare provider in the office, it works by breaking down the excess skin cells in the growth.
The results are modest compared to procedural options. In two large clinical trials, only 4% to 8% of patients had all four treated growths clear completely. When the bar was lowered to three out of four growths clearing, the numbers improved to 13% to 23%. Looking at individual lesions, 25% to 34% cleared fully, and about half became clear or nearly clear. Local skin reactions like redness and irritation were common but mostly mild and resolved within a few months.
This option makes the most sense if you want to avoid any cutting, freezing, or numbing and you’re comfortable with the possibility of needing multiple applications or accepting partial improvement.
Topical Retinoids: An Off-Label Option
Tazarotene, a prescription retinoid cream, has shown some ability to flatten seborrheic keratoses when applied twice daily. In a small study, about half of patients (7 out of 15) saw clinical improvement within 16 weeks, and those who responded found the cosmetic results acceptable. This isn’t a first-line treatment, and it takes months rather than minutes. But for people who prefer a gradual, at-home approach to reduce the appearance of their growths rather than eliminate them entirely, it’s an option worth discussing.
Healing Timeline After Removal
Regardless of the method, most in-office removal procedures follow a similar healing pattern. For cryotherapy specifically: expect burning or mild pain for the first day, a possible blister forming within 24 to 48 hours, and scabbing starting around days 7 to 10. The scab falls off on its own or with gentle rubbing, revealing pink new skin underneath. Full color normalization can take several weeks to months, and some people are left with a slightly lighter or darker patch at the treatment site.
Curettage and shave removal involve a small open wound that needs basic wound care (keeping it clean and covered) for about one to two weeks. Laser-treated areas heal similarly to curettage wounds but tend to be shallower. For all methods, sun protection on the healing area helps minimize long-term pigment changes.
Insurance Coverage
Most insurance plans consider seborrheic keratosis removal a cosmetic procedure and won’t cover it unless the growth is causing symptoms. Covered medical reasons typically include bleeding, intense itching, inflammation (pain, swelling, or redness), sudden growth, drainage, or ulceration. If your growths are purely a cosmetic concern, expect to pay out of pocket. Cryotherapy is usually the least expensive option, while laser treatment tends to cost the most per session.
When a Growth Deserves Closer Examination
Seborrheic keratoses are harmless, but melanoma can occasionally mimic their “stuck-on” waxy appearance. Dermatologists use a handheld magnifying tool called a dermoscope to look for features typical of benign keratoses, like tiny white cysts and dark plug-like openings. The challenge is that melanoma can also produce some of these same features, particularly a scaly surface and dark openings, especially in melanomas that grow along hair follicles. Any growth that looks different from your other keratoses, changes rapidly, or has an uneven color pattern is worth having examined.
One rare but important pattern: the sudden eruption of many seborrheic keratoses over a short period, known as the Leser-Trélat sign, can be associated with internal cancers, most commonly stomach, colon, or breast cancers. Unlike typical keratoses that accumulate gradually over years, these appear and spread rapidly, often within months. This is uncommon, but a rapid crop of new growths is worth mentioning to your doctor.