Laser and Skin

Warts: when to treat, when to wait

Warts are caused by the human papillomavirus (HPV) and, in children, about 50% clear within 6 months and 90% within 2 years without any treatment at all. When treatment is worth it, salicylic acid resolves roughly 70% of warts within 12 weeks and cryotherapy reaches a similar 70% after 3 to 4 months of repeat freezing, while any laser that breaks the skin is a medical procedure that belongs in a clinic rather than a beauty salon.

What causes a wart and why it comes back

A wart is a benign growth caused by the human papillomavirus, HPV. Types 1, 2, 3, 4, 10, 27, 29 and 57 are the ones most often found on skin, and the virus enters through tiny breaks in the outermost layer, pushing nearby cells to divide faster than normal. The gap between contact and a visible wart, the incubation period, can run to 12 months, which is why the moment of infection is rarely obvious.

Because the virus sits in the skin rather than the bloodstream, no tablet clears it. Every treatment works on the tissue, not the pathogen, and that explains the recurrence pattern: if infected cells survive at the edge of a treated area, a new wart can appear within a few weeks at the same spot.

Moist, softened skin takes up the virus more easily, so swimming pools, saunas and shared showers are common transmission points. Plenty of warts also clear without any treatment. In children, roughly 50% disappear within 6 months and about 90% are gone within 2 years; warts in adults tend to take longer and are more likely to persist beyond that window.

How the removal methods compare

Salicylic and lactic acid preparations soften the outer skin layer over several weeks and are applied at home. Used daily, they clear about 70% of warts within 12 weeks. Cryotherapy destroys the tissue with intense cold and is usually repeated in a clinic, reaching a similar success rate of around 70% after 3 to 4 months of regular freezing. Curettage scrapes the wart away mechanically in a single visit, and electrosurgery removes it with an electric current, though it carries a recurrence rate of about 20% within a few months. Anyone with a pacemaker or an implantable defibrillator should say so before electrosurgery, since the current can interfere with the device.

Laser treatment works with heat rather than cold or a blade. An ablative laser removes the tissue layer by layer over 1 to 3 sessions, while a vascular, pulsed dye laser seals the blood vessels feeding the wart so it dies off over 2 to 4 sessions. Both approaches break the epidermis, which puts them in the same category as other ablative laser treatments on skin: a medical procedure, not a beauty one.

Where exactly that line sits depends on the country, though it exists everywhere. In Germany, for example, the law reserves ablative and epidermis-breaking laser use for licensed physicians; in the UK and the US, the equivalent boundary runs between an over-the-counter pharmacy product and a GP or dermatologist's office. A salon is not the right setting for a laser that breaks the skin, wherever the appointment is booked.

When the appointment should not wait

A rough patch assumed to be a wart is not automatically one. Verrucous skin, molluscum, seborrhoeic growths and, rarely, malignant lesions can look similar at a glance. Four signs argue against waiting and self-treating any further: rapid growth over a few weeks, bleeding with no injury to explain it, a change in colour, and pain when walking or gripping.

Self-treatment is off the table from the start in several situations too: warts on the face or in the genital area, warts in young children without a clinician's guidance, warts alongside diabetes or poor circulation in the feet, and warts in anyone with a weakened immune system. In these cases, the clinic chooses the method, not the pharmacy shelf.

The look-alikes that get mistaken for a wart

The common wart usually sits on the hands and fingers, with a rough, cauliflower-like surface and small dark dots that are clotted capillaries, not roots. A plantar wart grows inward under the pressure of body weight on the sole of the foot and hurts most with direct pressure, one way clinicians tell it apart from a plain callus.

Molluscum contagiosum looks different again: smooth, skin-coloured bumps with a tiny central dimple, caused by a separate virus and seen mainly in children. A seborrhoeic keratosis, often called an age spot, is not a wart at all. It is a benign, non-contagious growth that appears with age and needs no antiviral thinking whatsoever, though a changing mole deserves the same rapid-growth, bleeding and colour-change checklist described above before anyone assumes a spot is harmless.

Self-treatment, done properly

Anyone treating an ordinary hand wart at home works with patience rather than force. Salicylic acid is applied daily, the softened skin is filed down gently after a warm soak, and the routine continues for 6 to 12 weeks before most people see the wart lift away.

The healthy skin around the wart needs protection, for example with a zinc paste or a plaster with a hole cut to size. Applying acid over a wide area burns the surrounding skin and makes the whole process more painful than it needs to be, often adding weeks to a routine that should take 6 to 12 weeks in the first place.

Self-treatment stays off the table for warts on the face, in the genital area, in young children without a clinician's guidance, in people with diabetes or poor circulation in the feet, and in anyone with a weakened immune system. Here, too, the clinic decides the method.

Ways to limit spread

Frequently asked

Do warts really disappear without treatment?

Yes, for many people. In children, about 50% clear within 6 months and 90% within 2 years, while adult warts often take longer. Waiting is a reasonable choice for children and for warts in inconspicuous places.

Can a beauty salon remove a wart with a laser?

No. Any laser that removes tissue or breaks the epidermis counts as a medical procedure. In Germany, for example, the law reserves this for licensed physicians, and comparable scope-of-practice rules apply in the UK and the US.

Why does a wart come back after treatment?

Because the virus can remain in the skin at the edge of the treated area, so only the visible growth is removed, not the pathogen. Electrosurgery in particular carries a recurrence rate of about 20% within a few months.

Are warts contagious?

Yes, through direct skin contact and damp surfaces. Swimming pools, saunas and shared showers are common transmission points because softened skin absorbs the virus more easily.

When should a wart be checked by a doctor rather than treated at home?

See a clinician for rapid growth, bleeding without an injury, a colour change, or pain when walking or gripping, and always for a wart on the face, in the genital area, or alongside diabetes, poor circulation or a weakened immune system.

Sources

• NHS: Warts and verrucas · treatment timelines, when to see a GP
• DermNet: Viral wart · HPV types, incubation, resolution and treatment success rates
• American Academy of Dermatology: Warts overview · cause, contagiousness, when to see a dermatologist
• MedlinePlus (NIH): Warts · wart types and treatment options

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This guide is for general information. It does not replace medical or professional cosmetic advice or an examination.