Wart Removal in Singapore: Why Warts Come Back, and How Doctors Remove Them

Reviewed by Dr Eugene Lim | MBBS, Dr Cindy’s Medical Aesthetics, Singapore. Fully registered with the Singapore Medical Council, practising alongside Dr Cindy Yang.

The wart on your finger has been there for four months. You have filed it, covered it, tried a preparation from the pharmacy and, for about two weeks, thought it had gone. It came back in the same place, slightly wider, and there is now a second one on the knuckle beside it.

Or it is on the sole of your child’s foot, found while you were helping with school shoes. It hurts to press, it has small black dots in the middle, and a corn plaster has done nothing.

Or it is on your face, a small rough spike near the lip that catches the razor every morning and has started to multiply along the jaw.

Warts are common, viral and sometimes stubborn. This article explains why they can return after apparently successful treatment, which removal methods exist, what the evidence says about the common options, and how a doctor decides whether treatment is appropriate.

What a wart is, and how to recognise one

A wart is a benign growth of the skin caused by infection with certain types of human papillomavirus, HPV. More than 200 HPV types have been identified, with particular types associated with common cutaneous warts on the hands, feet, face and other areas.

The virus gains access through small disruptions in the skin barrier. Cracked skin around the nails, minor abrasions and repeated friction can provide entry points. Between exposure and the appearance of a visible wart there can be an incubation period of weeks to months, which is why most patients cannot identify exactly where or when they acquired it.

Several features can suggest a wart during examination. The surface is often rough or papillomatous. Normal skin lines may be interrupted as they cross the lesion. Tiny black or dark red dots can sometimes be seen within the wart, particularly after some of the overlying keratin has been pared down. These represent thrombosed capillaries and are a useful clue when distinguishing a plantar wart from a corn or callus.

None of these signs is a perfect home diagnostic test. The appearance varies with the type and location of the wart, and other skin lesions can occasionally look similar. Warts are grouped by where they occur and how they look.

Common warts are the raised, rough papules commonly found on fingers, knuckles, elbows and knees.

Plantar warts occur on the soles of the feet. Pressure from walking can flatten them and push the thickened surface inward.

Flat warts are smaller, smoother and flatter and may occur in clusters on the face, backs of the hands and shins.

Filiform warts form narrow, projecting growths and commonly occur around the face and neck.

Periungual warts grow around, beside or sometimes beneath the fingernails and toenails.

Genital warts are associated with particular HPV types, follow a different clinical pathway and are outside the scope of this article.

Warts are contagious. HPV can spread through direct contact and from one part of a person’s body to another. Transmission from contaminated surfaces can also occur, particularly where skin is wet, softened or damaged. Picking, biting or shaving across a wart can create small breaks in adjacent skin and may contribute to autoinoculation.

Warts also have look-alikes, and the doctor’s first job is to make sure the lesion fits the diagnosis. In an older adult, for example, a rough brown growth may be a seborrhoeic keratosis rather than a wart. That group of benign growths is covered in our article on seborrhoeic keratoses and other benign bumps. A lesion that is unusually pigmented, changing rapidly, repeatedly bleeding without obvious trauma, persistently ulcerated or otherwise does not fit an ordinary wart needs further assessment.

If a lesion is suspicious or the diagnosis remains uncertain, cosmetic laser destruction is not the next step. It is referred for specialist assessment so that biopsy or another appropriate diagnostic procedure can be performed if necessary.

Our field guide to small skin growths covers several common look-alikes, while our guide to checking a mole covers the changes in a pigmented lesion that deserve medical attention.

Why warts are stubborn

HPV infects keratinocytes within the epidermis and alters their normal growth, producing the thickened lesion visible on the surface. The virus can persist in the skin without producing a strong inflammatory response. That helps explain why a wart can remain for months or even years before the immune system eventually clears the infection.

This also explains why removing the visible surface of a wart does not necessarily mean the infection has been eliminated. A wart may recur after treatment if infected tissue persists, and the patient’s immune response also influences whether the infection ultimately clears. That is why wart treatment is not simply a matter of cutting off the part that can be seen.

Different treatments work through different mechanisms. Some gradually remove keratinised infected tissue. Others physically destroy wart tissue. Some treatments may also stimulate a local immune response.

None guarantees clearance in every patient.

The clinic’s own page on laser removal of skin growths makes the practical point clearly: warts can recur because they are viral, and recurrent lesions may need further treatment.

Do warts go away on their own?

Often, yes. Spontaneous clearance is particularly common in children. Older observational studies found that a substantial proportion of childhood warts disappear without treatment over one to two years as the immune system recognises and clears the infection. The exact probability for an individual patient is much harder to predict. Age, duration, number and location of the warts, as well as immune status, can all influence persistence.

That means waiting can be reasonable for a small, asymptomatic wart, particularly in a child. Treatment becomes more attractive when a wart is painful, spreading, repeatedly traumatised, cosmetically troublesome or persistent enough that the patient no longer wants to wait for spontaneous clearance.

Plantar warts can interfere with walking. Facial warts may be repeatedly traumatised by shaving. Periungual warts can spread around the nail and become increasingly difficult to manage. Patients whose immune systems are suppressed may also develop more numerous, persistent or treatment-resistant warts and should discuss them with a doctor. A persistent lesion in an adult should also be reassessed if there is any doubt that it is actually a wart.

The methods, and what the evidence says

There is no single treatment that clears every wart. The evidence base includes trials of salicylic acid, cryotherapy and other treatments, including the 2012 Cochrane review of topical treatments for cutaneous warts and a Dutch primary-care trial that compared cryotherapy, salicylic acid and watchful waiting.

Over-the-counter salicylic acid preparations. Salicylic acid is keratolytic. Used consistently, it gradually softens and removes the thickened keratin overlying the wart. The Cochrane review found salicylic acid more effective than placebo overall, although treatment generally requires repeated application over several weeks. It remains a reasonable first-line option for many uncomplicated common and plantar warts. Care is needed with the surrounding normal skin, and products intended for the hands or feet should not simply be transferred to sensitive facial skin.

Cryotherapy. Liquid nitrogen destroys wart tissue by freezing it. Cryotherapy is a well-established treatment for common warts, although studies show variable clearance rates and repeated sessions are often required. More aggressive freezing may improve clearance in some circumstances but also increases pain, blistering and the risk of pigment change or scarring. Pigment change deserves particular consideration in more deeply pigmented skin because cryotherapy can produce temporary or occasionally persistent hypopigmentation. Cryotherapy is an established wart treatment generally, but it is not the in-house wart-removal method used at Dr Cindy’s Medical Aesthetics.

Ablative laser. This is the in-house wart-removal method used at Dr Cindy’s Medical Aesthetics. An ablative laser removes wart tissue in a controlled manner. Treatment depth is adjusted according to the lesion and its location, while unnecessary injury to surrounding skin is limited. Laser can be considered for warts that have persisted despite home treatment, as well as lesions where procedural removal is appropriate. It should not be presented as a guaranteed cure. Warts are caused by HPV, and recurrence remains possible after apparently complete removal. The clinic reviews treated warts at approximately four weeks. If residual or recurrent wart tissue is present, the doctor can decide whether another treatment session is appropriate.

Electrosurgery and curettage. These are established procedural options used for selected warts in clinical practice. They are not the clinic’s in-house wart-removal methods and are mentioned here as alternatives that exist rather than treatments offered by Dr Cindy’s Medical Aesthetics.

Other medical treatments. Other therapies are available for persistent, extensive or treatment-resistant warts, including treatments intended to stimulate an immune response. Their use depends on the wart type, location, previous treatments and the patient’s medical circumstances.

Plantar warts are a different problem

On the sole of the foot, body weight changes the appearance of a wart. Instead of projecting outward like a typical wart on a finger, a plantar wart is compressed by walking and standing. Thick overlying keratin can make the lesion appear relatively flat even when substantial wart tissue is present. Plantar warts are also commonly confused with corns and calluses. After some of the thickened surface is pared down, a plantar wart may reveal thrombosed capillaries and interruption of normal skin lines. A corn or callus more typically preserves the skin-line pattern. These findings are useful diagnostic clues rather than absolute rules.

Plantar warts can be particularly uncomfortable because pressure from standing and walking repeatedly loads the affected area. They can also be more difficult to treat than common hand warts. The sole has a thick stratum corneum, and plantar warts may require repeated treatment regardless of the method chosen. Clinical trials have also shown that treatment results for plantar warts can differ from those for common warts on the hands.

At Dr Cindy’s Medical Aesthetics, plantar warts are assessed and treated in-house where laser removal is appropriate. The doctor may reduce excess overlying keratin where necessary before using the ablative laser to treat the wart itself. Because the sole bears weight continuously, the treated area can be more uncomfortable than an equivalent treatment site elsewhere, and healing needs to be protected from unnecessary friction and pressure.

Patients receive instructions on dressing and caring for the treated area. Footwear or padding may also be useful when the location makes walking uncomfortable. The wart is reviewed at approximately four weeks. If residual or recurrent wart tissue is present, further laser treatment may be considered.

Warts on the face and around the nails

Filiform and flat warts can occur on the face. Shaving across a wart can traumatise it and may contribute to spread along the shaved area, so repeatedly shaving directly over an active wart is best avoided. The face also demands a different balance between removal and the mark left by treatment.

Aggressive treatment can produce post-inflammatory hyperpigmentation, hypopigmentation or scarring, so treatment depth and lesion selection matter. Over-the-counter wart preparations intended for thicker skin on the hands and feet should not be used indiscriminately on the face because they can irritate or injure facial skin.

Facial warts are assessed individually before treatment. Periungual warts, around or beneath the nails, can be particularly difficult to treat. Their position close to the nail matrix matters because excessive treatment can potentially affect nail growth. Nail biting, cuticle picking and repeated trauma can also contribute to spread around the fingers.

Dr Cindy’s Medical Aesthetics assesses and treats suitable periungual warts in-house using ablative laser. Treatment is controlled according to the wart’s position and depth, particularly when the lesion is close to structures responsible for normal nail growth. As with other warts, recurrence is possible and the treated area is reviewed at approximately four weeks.

What about warts in children?

Warts are extremely common in children, and many eventually disappear as the immune system clears the infection. That does not mean every childhood wart should simply be left alone. A painful plantar wart, a lesion that is spreading, a wart repeatedly traumatised during sport or daily activities, or one causing significant concern may justify treatment.

At Dr Cindy’s Medical Aesthetics, wart treatment in children is considered case by case rather than using a fixed minimum age. The doctor considers the child’s age, the location and extent of the warts, whether they are painful, what has already been tried and whether the child is likely to tolerate the procedure comfortably and safely. Sometimes treatment is appropriate. Sometimes continued observation or another approach makes more sense. The decision is made after assessment rather than from age alone.

Stopping the spread

Because warts are viral, preventing spread is useful whether the wart is being treated or simply observed. Avoid picking, scratching and biting warts. Do not share razors, nail files or other personal items that contact the lesion. Covering a wart when it is likely to be rubbed or traumatised can also help reduce direct contact.

For plantar warts, footwear in communal showers, pool areas and changing rooms reduces direct exposure of the soles to potentially contaminated surfaces. Keep feet reasonably dry and avoid picking or filing a wart with tools that are then used elsewhere on the skin.

Singapore’s warm, humid environment means swimming pools, gyms and communal changing facilities are used throughout the year, so these practical precautions remain relevant. Humidity itself is not the cause of warts. HPV is.

What a wart removal appointment involves, and what drives the cost

The appointment begins with diagnosis. The doctor examines the lesion and determines whether its appearance fits a wart. Thick overlying keratin may be pared where appropriate to help assess a plantar lesion.

Site, number, size, duration, previous treatments and the patient’s medical history all affect the treatment plan. If a lesion does not clearly behave or look like a wart, particularly if it is unusually pigmented, changing, bleeding or persistently ulcerated, cosmetic laser removal is not automatically performed. A suspicious or diagnostically uncertain lesion is referred for specialist assessment.

For suitable warts, Dr Cindy’s Medical Aesthetics uses ablative laser for in-house removal. The area is prepared and anaesthetised as appropriate, and the doctor performs the laser treatment. Several suitable warts may be treated during the same appointment. The patient receives aftercare instructions appropriate to the treatment site. The treated area may develop redness, tenderness and a crust or scab while it heals.

The clinic reviews wart treatment at approximately four weeks. The purpose is to assess healing and determine whether the wart has cleared or whether residual or recurrent tissue needs further treatment.

Wart assessment and laser removal are available at both the Orchard and Tampines clinics. Plantar and periungual warts are also treated in-house where suitable. Children are assessed case by case rather than according to a fixed minimum age.

What drives the cost. There is no useful single price that describes every wart-removal case. The number of warts matters. So do their size and location. A small wart on a finger is a different procedure from multiple plantar or periungual warts. The possibility of additional sessions also affects the eventual treatment cost because some warts recur or require more than one treatment. Our guide to mole removal explains similar considerations for other skin-growth procedures.

Three things patients commonly get wrong

“Cutting, filing or picking a wart at home will remove it.” Removing the visible surface does not necessarily eliminate the HPV-infected tissue. Picking, cutting or repeatedly traumatising a wart can also cause bleeding, secondary infection and spread to adjacent skin. That is different from carefully paring excess keratin as part of an appropriate salicylic-acid regimen for a suitable wart. The distinction is controlled treatment versus repeatedly injuring the lesion.

“A wart that has been treated once is gone.” Sometimes it is. Sometimes it is not. No established wart treatment has a 100 per cent clearance rate, and repeat treatment is common with some types of warts. A wart can appear to have cleared and later recur. That is why Dr Cindy’s Medical Aesthetics reviews treated warts at approximately four weeks rather than assuming that one laser session has permanently eliminated the problem.

“Duct tape removes warts.” Duct tape became popular after an early trial suggested a benefit, but subsequent studies have produced inconsistent results, and systematic reviews have not established it as a reliably effective wart treatment. Covering a wart can still have a practical purpose by reducing direct contact and discouraging picking. That is different from saying the tape itself reliably clears HPV infection.

What a consultation involves

A wart consultation at Dr Cindy’s Medical Aesthetics begins with a practical question: is this actually a wart? The doctor examines the lesion, considers its location and appearance and looks for additional lesions where relevant. You will be asked how long it has been present, whether it has spread, whether it hurts or bleeds, what treatments have already been tried and whether there are medical factors that may affect healing or immunity.

If the lesion is a wart and laser removal is appropriate, the doctor explains what the treatment involves, what the area is likely to look and feel like afterwards, the possibility of pigmentation or another residual mark, and the chance that another treatment may be needed.

The clinic uses ablative laser for in-house wart removal. Plantar and periungual warts are treated in-house where suitable. Children are considered individually rather than according to a fixed age cutoff. Assessment and treatment are available at both Orchard and Tampines.

A review is scheduled at approximately four weeks to check healing and whether the wart has cleared. If residual or recurrent wart tissue remains, the doctor decides whether another laser session is appropriate. If the lesion does not fit an ordinary wart or has suspicious features, cosmetic laser treatment is not the next step. It is referred for specialist assessment.

You leave knowing what the lesion is, whether treatment is appropriate, what the treatment is intended to accomplish, what to expect while the skin heals, and what happens if the wart returns.

Where to be seen, and who sees you

Dr Cindy’s Medical Aesthetics assesses and removes warts at both of its clinics.

Orchard. 360 Orchard Road, #05-06 International Building, Singapore 238869. Monday and Thursday 11.30am to 7pm, Tuesday, Wednesday and Friday 10am to 8pm, Saturday 10am to 3pm. Closed Sunday and public holidays.

Tampines. 1 Tampines Central 5, #07-01 CPF Tampines Building, Singapore 529508. Monday to Friday 11.30am to 9pm, Saturday 10am to 7pm. Closed Sunday and public holidays.

Assessments are carried out by the clinic’s doctors: Dr Cindy Yang, founder and medical director; Dr Eugene Lim, fully registered with the Singapore Medical Council; and Dr Grace Su, a general practitioner working in aesthetic and lifestyle medicine.

Some presentations belong with a dermatologist or a hospital skin clinic. Extensive or rapidly multiplying warts in a patient whose immune system is suppressed, warts that have failed several rounds of treatment over years, and any wart-like lesion that is pigmented, that bleeds without injury, that has grown quickly or that a doctor cannot confidently identify are referred, or removed by a method that yields tissue for histological examination. Warts in young children are assessed first, and the doctor decides at the consultation whether treatment in-clinic is suitable.

Whichever clinic you choose, look for five things: a doctor registered with the Singapore Medical Council; an examination of the lesion itself, with the surface pared where needed and a dermatoscope where the diagnosis is in doubt; a method chosen for the wart, its site and your skin type, and not the other way round; tissue sent for histology whenever a lesion is removed because of any suspicious feature; and a plain statement of the expected mark and healing time before anything is done.

Dr Cindy’s Medical Aesthetics has practised in Singapore since 2010, and its doctors treat a wart as they treat every skin growth: by naming the lesion first, and choosing the method for it.

Frequently asked questions

What causes warts and are they contagious?

Warts are caused by the human papillomavirus, HPV, which enters through small breaks in the skin and makes the cells of the outer layer multiply into a rough lump. They are contagious. The virus passes by skin contact, by contact with surfaces such as wet pool decks and shower floors, and from one part of the body to another through scratching or picking. Between contact and a visible wart there is an incubation period of weeks to months.

How are warts removed in Singapore?

A doctor first confirms the lesion is a wart, then chooses a method for its site, size, number and depth. Over-the-counter preparations used daily for weeks soften and peel the wart. Cryotherapy freezes it with liquid nitrogen in repeated cycles. Ablative laser, which Dr Cindy’s Medical Aesthetics offers, carbonises the wart to a controlled depth and is used for resistant, plantar and multiple warts. A scab forms and falls over 3 to 10 days depending on size and site. Prescription options exist for warts that have failed these methods.

Do warts go away on their own?

Often, in children. A two-year study of untreated warts found that about two-thirds had resolved within two years, and about half are commonly quoted as clearing within a year. Adults clear warts more slowly, and warts present for more than a year, warts in adults over 30 and warts in anyone with a suppressed immune system can persist for years. Spreading warts, painful plantar warts and facial warts are treated without waiting.

Why do warts come back after treatment?

The virus lives in living skin cells beneath the visible wart. A treatment that removes the surface lump without reaching those cells, or without prompting the immune system to recognise the infection, leaves the source in place, and a new wart grows from the same base. This is why no published method clears every wart in one attempt, why treatment is planned with a second look in mind, and why a recurring wart may need a repeat session.

Which doctor should I see for warts?

A doctor registered with the Singapore Medical Council who examines the lesion itself before choosing a method. Dr Cindy’s Medical Aesthetics assesses and removes warts at its Orchard and Tampines clinics. Extensive warts in a patient with a suppressed immune system, warts that have failed several rounds of treatment over years, and any wart-like lesion that is pigmented, bleeds without injury or grows quickly are referred to a dermatologist. Genital warts follow a separate clinical pathway.

Is a plantar wart treated differently from a wart on the hand?

Yes. Body weight pushes a plantar wart inward, so it is deeper, sits under skin several times thicker than the skin of the hand, and hurts on walking. Topical preparations and shallow freezing reach it poorly, and in a 2010 primary-care trial neither beat watchful waiting on the sole. Laser removal to the wart’s base, footwear that takes weight off the site, a dressing kept dry and a scab of 7 to 10 days are typical, and a repeat session four weeks later is more likely than on the hand.

References

1. Kwok CS, Gibbs S, Bennett C, Holland R, Abbott R. Topical treatments for cutaneous warts. Cochrane Database Syst Rev 2012;(9):CD001781.

2. Bruggink SC, Gussekloo J, Berger MY, Zaaijer K, Assendelft WJ, de Waal MW, Bavinck JN, Koes BW, Eekhof JA. Cryotherapy with liquid nitrogen versus topical salicylic acid application for cutaneous warts in primary care: randomized controlled trial. CMAJ 2010;182(15):1624-1630.

3. Massing AM, Epstein WL. Natural history of warts: a two-year study. Arch Dermatol 1963;87:306-310.

4. Focht DR, Spicer C, Fairchok MP. The efficacy of duct tape vs cryotherapy in the treatment of verruca vulgaris (the common wart). Arch Pediatr Adolesc Med 2002;156(10):971-974.