How to Burn Off Warts: Clinical and At-Home Methods

“Burning off” a wart can mean freezing it with liquid nitrogen, zapping it with an electrical current, vaporizing it with a laser, or dissolving it with a caustic chemical. All of these approaches destroy the wart tissue so the body can heal over it, but they differ in how deeply they penetrate, how much they hurt, and how likely they are to leave the wart gone for good. Choosing between them depends on where the wart is, how stubborn it has been, and whether you’re treating it at home or in a clinic.

Cryotherapy With Liquid Nitrogen

Cryotherapy is the method most people picture when they think of having a wart removed at a doctor’s office. A clinician applies liquid nitrogen, either as a spray or through a metal probe, directly onto the wart. The extreme cold destroys the wart cells by rupturing them from the inside out.¹ Within a day or two, a blister forms underneath the wart, and the dead tissue eventually peels away over the following week or so.

Technique matters more than you might expect. A trial comparing two cryotherapy protocols found that applying liquid nitrogen for 10 seconds every two weeks cleared about 78% of common warts, while freezing for 20 seconds every four weeks cleared roughly 54%.² Separate research confirmed that a sustained 10-second freeze clears significantly more warts than a briefer traditional freeze, though it also causes more pain and blistering. In that study, about two-thirds of patients in the longer-freeze group were wart-free after five sessions, compared with roughly 39% in the shorter-freeze group.³ The takeaway: shorter but more frequent sessions tend to outperform longer but less frequent ones, and how long the freezing lasts in each session is a real variable in outcomes.

Cryotherapy usually requires multiple visits. A single freeze seldom finishes the job, especially for plantar warts on the soles of the feet, where thick skin insulates the wart. Most protocols call for treatments every two to three weeks until the wart is gone, which can mean anywhere from three to six office visits.

Electrosurgery and Electrocautery

Electrosurgery uses high-frequency electrical current to heat and destroy wart tissue directly. It works through a combination of cutting and coagulation: the electrical energy dries out and chars the wart cells, and the clinician then scrapes away the dead material with a curette.⁴ Because the procedure involves burning live tissue, local anesthesia is standard.

For genital warts, systematic reviews report very high clearance rates with electrosurgery, in the range of 94 to 100%.⁴ For common skin warts, results are more modest. A study comparing electrosurgery with cryotherapy for plantar warts found overall clearance rates of about 75% and 73% respectively, essentially a coin flip. However, electrosurgery came with more pain, slower wound healing, more scarring, and a somewhat higher recurrence rate at six months (about 22% versus 17% for cryotherapy).⁵

Where electrosurgery has a clearer edge is with deep or bulky warts. A systematic review of cutaneous warts found electrocautery cure rates of 73 to 76% for deep lesions, outperforming standard cryotherapy’s 44 to 58% cure rate in similar cases.⁶ If you have a thick, entrenched wart that hasn’t budged after freezing, electrosurgery is a reasonable next step.

Laser Treatments

Lasers offer a more precise way to destroy wart tissue, and several types are used depending on what the clinician wants to target. The CO₂ laser works as an ablative tool: it vaporizes the wart layer by layer, with the advantage of precise depth control that limits damage to surrounding healthy skin.⁷ It is particularly useful when there are many warts to treat at once, because the procedure is fast and there’s minimal bleeding.

Vascular lasers take a different approach. The pulsed dye laser (PDL) and the Nd:YAG laser target the tiny blood vessels that feed the wart. By destroying those vessels, the laser cuts off the wart’s blood supply and triggers an immune response that helps the body clear the virus. The PDL selectively heats blood vessels without damaging surrounding tissue, which lowers the risk of scarring. The Nd:YAG laser works similarly, targeting hemoglobin deeper in the skin.⁷

A study of genital warts found that CO₂ laser treatment achieved 95% complete clearance in a single session, compared with about 46% for cryotherapy. Recurrence was also lower: roughly 2.5% for the laser group versus 18% for cryotherapy.⁸ Those are impressive numbers, but laser treatment is also the most expensive clinical option and not available in every dermatology office. It tends to be reserved for warts that haven’t responded to simpler methods, or for cases where precise tissue preservation matters, like warts near the nail bed or on the face.

Chemical Cautery

Chemical methods burn warts by destroying the tissue with caustic substances rather than heat or cold. Trichloroacetic acid (TCA) is the one most commonly applied in clinic. It works by denaturing the proteins in wart tissue, causing the cells to die and slough off.¹ TCA is cheap, widely available, and safe to use during pregnancy, which makes it a go-to for genital warts in particular.

A study comparing TCA (combined with silver nitrate) against cryotherapy for plantar warts found that TCA achieved 82% complete resolution versus 74% for cryotherapy. What stood out was the recurrence rate: only 12% in the TCA group compared with 38% for cryotherapy. The TCA group also had shorter treatment times and fewer side effects.⁹

Silver nitrate is another chemical cauterant, available as pencil-shaped sticks that you press against the wart. In a placebo-controlled trial, silver nitrate fully cleared warts in 43% of patients, with another 26% showing partial healing, compared with just 11% clearance in the placebo group.¹⁰ Silver nitrate sticks are inexpensive and easy to use, which is appealing, but the complete cure rate is low enough that many clinicians consider them a second-tier option. They also stain the skin dark brown or black, which is cosmetically annoying but not harmful.

At-Home Options

Over-the-counter wart treatments fall into two main categories: freeze sprays and salicylic acid preparations. Both are widely available at pharmacies, and both work on the same general principle as their clinical counterparts, just with less firepower.

OTC freeze kits use a compressed gas mixture (usually dimethyl ether and propane) to create a cold tip that you press against the wart. These products are marketed as “cryotherapy,” but they don’t come close to the temperatures of clinical liquid nitrogen. Lab testing has shown that none of the commercially available OTC coolants get as cold or freeze tissue as quickly as liquid nitrogen does.¹¹ Liquid nitrogen boils at around −196°C, while most OTC products top out around −57°C. That’s still cold enough to cause some cell damage, but the shallower freeze means these products work best on small, flat warts and often fail on thicker plantar warts.

Salicylic acid is the other mainstay of home treatment. It comes as liquids, gels, pads, and patches in concentrations typically ranging from 17% to 40%. You apply it daily after softening the wart in warm water and filing down the dead skin. It works slowly, dissolving the wart layer by layer over several weeks. The routine demands patience. Skipping days or not filing between applications lets the wart rebuild faster than the acid can dissolve it.

Duct tape occlusion is a folk remedy that has attracted some clinical attention. The idea is to cover the wart with duct tape for six days, soak it, file the dead skin, then repeat. Results have been mixed enough that it’s hard to give a strong endorsement, but it’s cheap and painless, which makes it worth trying for people who want to exhaust noninvasive options before moving to a clinic.

How the Methods Compare

Given all the options, you might expect one method to be a clear winner. The evidence is surprisingly equivocal for common hand and foot warts. A Cochrane systematic review, which pools data from multiple trials, found no significant difference in effectiveness between cryotherapy and salicylic acid when looking across all body sites.¹² The same review found that salicylic acid clearly outperformed placebo, with a cure rate of about 73% versus 48% in control groups across five pooled trials.¹³

That said, one well-designed trial did find a meaningful gap favoring cryotherapy specifically for common (non-plantar) warts: 49% cure with cryotherapy versus 15% with salicylic acid and 8% with no treatment.¹⁴ Plantar warts, by contrast, responded poorly to both treatments in the same study. Location clearly matters: the thick skin on the sole of the foot is a formidable barrier for both freezing and topical acids.

The practical conclusion from the Cochrane evidence is that for ordinary warts, starting with salicylic acid at home is a defensible first step. It costs less and you can do it yourself. If weeks of consistent application don’t work, clinical cryotherapy is the natural escalation. Electrosurgery and laser treatments are best reserved for warts that have resisted those first-line approaches or for situations where size, depth, or location makes them more appropriate.

Pain and How to Manage It

Pain is one of the most common reasons people delay or abandon wart treatment, and it varies enormously by method. Salicylic acid is essentially painless during application, though the wart area can get sore if you file too aggressively. OTC freeze kits produce a sharp sting for a few seconds. Clinical cryotherapy with liquid nitrogen is a different experience: the pain during freezing ranges from mild to severe, and it lingers as a burning throb for hours afterward. In one pediatric study, pain after cryotherapy was universal among participants, and one child vomited before each treatment session from anxiety.¹⁵

Research on numbing creams before cryotherapy has been somewhat disappointing. A randomized trial of lidocaine/prilocaine cream applied an hour before liquid nitrogen found no significant overall reduction in pain compared with placebo. There was a hint of benefit in children who had warts on the palms or soles, where the skin is thicker, but the evidence wasn’t strong enough to draw a firm conclusion.¹⁶ A separate study found better results when anesthetic cream was applied after the cryotherapy session rather than before, reducing the post-treatment pain that tends to bother people most.¹⁷ If your clinician offers numbing cream, asking for it after treatment rather than before may be the better strategy.

Electrosurgery involves local anesthetic injections before the procedure, so the burning itself isn’t felt, but the injection stings, and the wound can be sore for days. The blistering phase of cryotherapy tends to resolve in about a week. Laser-treated sites heal on a similar timeline, though CO₂ laser wounds can take slightly longer because of the depth of tissue removed.

What It Costs

An economic evaluation alongside a randomized trial in the UK found that cryotherapy cost on average about £101 more per patient over 12 weeks than salicylic acid, with no additional benefit in terms of the proportion of patients healed.¹⁸ That gap widens in a system where you’re paying out of pocket for each office visit. Salicylic acid products run a few dollars at the pharmacy; OTC freeze kits cost somewhat more but are still a fraction of a clinical visit. Electrosurgery and laser sessions, which require local anesthesia, specialized equipment, and sometimes follow-up wound care, sit at the top of the cost ladder.

For most people, starting cheap and escalating makes financial sense. You lose nothing by trying salicylic acid faithfully for six to eight weeks before booking a cryotherapy appointment. The exception is when time matters: if you need a wart gone quickly for professional or personal reasons, or if it’s painful enough to affect daily life, going directly to a clinic saves weeks of home treatment that might not work.

Why Warts Come Back

Every method of wart removal shares the same fundamental limitation: none of them directly kills the virus (HPV) living in the surrounding skin cells. They all destroy the visible wart, but invisible virus particles can remain in the tissue around the edges. If the immune system doesn’t mop up those remnants, the wart regrows. This is why recurrence rates are stubbornly high across all treatments, typically somewhere between 10% and 30% depending on the method and the wart type.

Recurrence numbers vary by study, but a few patterns hold. Cryotherapy recurrence rates ranged from about 17% to 38% across the studies cited here, while electrosurgery hovered around 22%.⁵ CO₂ laser had the lowest recurrence in one trial, at roughly 2.5%.⁸ TCA combined with silver nitrate showed about 12% recurrence for plantar warts.⁹ These numbers come from different populations and different wart types, so direct head-to-head comparisons should be read carefully, but the trend is consistent: more aggressive destruction of the wart base tends to reduce recurrence.

Immune function plays a role too. People who are immunosuppressed, whether from medication, chronic illness, or other causes, tend to have more persistent and recurrent warts regardless of the treatment method. In immunocompetent adults, most warts eventually resolve on their own even without treatment, though “eventually” can mean months or years.

HPV in Surgical Smoke

One risk of burning off warts that rarely gets discussed outside the medical literature applies mainly to healthcare workers, not patients: the smoke produced by electrosurgery and laser ablation can contain fragments of HPV DNA. A systematic review found that out of 12 studies that directly measured HPV DNA in surgical smoke, 10 detected it, and the viral subtypes in the smoke generally matched those in the wart being treated.¹⁹ HPV has been identified in smoke from CO₂ laser ablation, electrosurgery, and loop electrosurgical excision procedures.²⁰

Whether inhaling these fragments actually causes new HPV infections in practitioners is harder to prove, and the evidence remains circumstantial. But the finding has prompted recommendations for proper smoke evacuation systems and masks whenever warts are treated with energy-based devices. As a patient, this doesn’t change your treatment decision, but if your clinician treats a lot of warts and the room doesn’t have visible smoke extraction running, it’s worth noting as a general safety issue in the field.

1
Journal of Urological Surgery. The Effectiveness of Genital Wart Treatments
2
PubMed Central. Comparison of the Efficacy and Safety of Two Cryotherapy Protocols in the Treatment of Common Viral Warts: A Prospective Observational Study
3
British Journal of Dermatology. Cryotherapy of viral warts: a sustained 10‐s freeze is more effective than the traditional method
4
PubMed Central. The Effectiveness of Chemical Cautery and Electrosurgery on Anogenital Wart: Systematic Review
5
PubMed Central. Comparison of electrosurgery by electrodessication versus cryotherapy by liquid nitrogen spray technique in the treatment of plantar warts
6
PubMed. Comparative Effectiveness of Cryosurgery Versus Electrocautery in the Treatment of Cutaneous Verruca Vulgaris: A Systematic Review
7
PubMed Central. Sequential Use of CO2 Laser Prior to Nd:YAG and Dye Laser in the Management of Non-Facial Warts: A Retrospective Study
8
PubMed Central. CO2 Laser therapy versus cryotherapy in treatment of genital warts; a Randomized Controlled Trial (RCT)
9
International Journal of Research in Dermatology. Comparative efficacy of trichloroacetic acid combined with silver nitrate and cryotherapy in treating plantar warts study in Military Medical Specialty Center
10
PubMed. Efficacy of silver nitrate pencils in the treatment of common warts
11
PubMed. An in vitro study comparing temperatures of over-the-counter wart preparations with liquid nitrogen
12
Cochrane Database of Systematic Reviews. Topical treatments for cutaneous warts
13
Evidence-Based Child Health: A Cochrane Review Journal. Cochrane Review: Topical treatments for cutaneous warts
14
PubMed Central. Cryotherapy with liquid nitrogen versus topical salicylic acid application for cutaneous warts in primary care: randomized controlled trial
15
Archives of Pediatrics & Adolescent Medicine. The Efficacy of Duct Tape vs Cryotherapy in the Treatment of Verruca Vulgaris (the Common Wart)
16
Pediatric Dermatology. A Double‐Blind, Randomized, Placebo‐Controlled Trial of Eutectic Lidocaine/Prilocaine Cream 5% (EMLA)® for Analgesia Prior to Cryotherapy of Warts in Children and Adults
17
PubMed. Anesthetic cream relieves pain after cryotherapy treatment of plantar and palmar warts
18
PubMed Central. Cost-effectiveness of cryotherapy versus salicylic acid for the treatment of plantar warts: economic evaluation alongside a randomised controlled trial (EVerT trial)
19
Occupational and Environmental Medicine. Human papillomavirus and surgical smoke: a systematic review
20
Asian Journal of Surgery. Surgical smoke: A hidden killer in the operating room