By Dr Khushboo Sethia · Dermatologist, SkinWise Clinic Published Last reviewed
Warts: small bumps, big frustrations — and how to actually clear them
Warts are one of dermatology’s great equalisers. They turn up on the hands of nine-year-olds at boarding school, on the feet of marathon runners, on the eyelids of stressed-out 32-year-olds, and on the fingers of medical professionals who scrub a lot. They’re benign. They’re common. And they can be genuinely maddening — multiplying despite a year of over-the-counter salicylic acid, returning weeks after cryotherapy, sometimes spreading from one finger to the next while the original is being treated.
The honest truth about warts is that there’s no single perfect treatment. Most warts respond to one of several approaches; some need a combination; a stubborn minority test every tool we have. Patience is part of the plan.
Here’s how we think about warts at SkinWise — what works, what doesn’t, and when to stop home-treating and book a clinic visit.
What warts actually are
Warts are small skin growths caused by the human papillomavirus (HPV). There are over 100 HPV subtypes, and different subtypes prefer different parts of the body. The virus infects skin cells through tiny breaks — paper cuts, dry cracks, shaving nicks, the maceration of wet skin — and induces a thickened, focal growth.
A wart is the virus’s home. As long as that home exists, the patient is shedding virus and can spread it to themselves or others.
The defining features:
- They’re benign. None of the common skin warts are cancerous. (Genital HPV subtypes are a different and important conversation — see the note below.)
- They’re transmissible. Through direct skin contact, shared objects, or via the patient’s own hands.
- They can multiply. Especially when scratched, picked, or shaved over.
- They’re slow. Most warts develop weeks to months after exposure, and most take weeks to months to clear.
A note on genital warts: caused by specific HPV subtypes, sexually transmitted, manage differently from skin warts, and warrant evaluation by a dermatologist or gynaecologist/urologist. They are not what this article covers in detail — but if you have lesions in the genital area, please see a clinician rather than self-treating.
The kinds of warts we see
Common warts (verruca vulgaris)
Rough, raised, cauliflower-textured bumps. Most common on the hands and fingers, around the nails, sometimes on knees in children. Painless usually.
Plantar warts (verruca plantaris)
On the soles of the feet. Pressure from walking pushes them inward, making them look flatter than common warts and often painful. Often confused with calluses; the giveaway is small black dots (thrombosed capillaries) visible when the surface is pared down.
Flat warts (verruca plana)
Small, smooth, flat-topped, skin-coloured to slightly tan. Frequently in clusters on the face, the backs of the hands, the legs (especially in women who shave). Spreads readily through shaving — the most common autoinoculation site we see.
Filiform warts
Thread-like or finger-like projections, usually around the eyelids, lips, nose, and neck. Cosmetically prominent, otherwise harmless.
Periungual warts
Around or under the nail. Slow to clear, often disturb nail growth, and the nail makes complete clearance harder. See our nail-infection guide for what isn’t a wart in that area.
Mosaic warts
A cluster of plantar warts merging into a mosaic pattern on the sole. Stubborn.
Why warts spread (autoinoculation)
The single most important practical fact about warts: you spread them to yourself when you pick, scratch, shave or pare them. The virus is on the surface and in the contents; a small break in the surrounding skin gives it a new home.
This is why:
- A wart on a finger often leads to multiple warts on the same hand within months
- A flat wart on the leg becomes a constellation after shaving
- A facial wart spreads under a beard with regular shaving
- Picking is the worst thing you can do to a wart
When warts go away on their own
Many do. The body’s immune system eventually recognises the HPV and clears it — sometimes in months, sometimes in years. Roughly two-thirds of childhood warts clear spontaneously within two years.
The catch:
- The timeline is unpredictable
- During the wait, the warts can multiply
- Some warts are simply not going to clear on their own (large plantar warts, periungual warts, multiple stubborn flat warts)
We treat actively when:
- Warts are spreading
- They’re painful (most plantar warts)
- They’re in cosmetically or socially visible areas
- They’ve been there for more than 6 months without change
- The patient is immunocompromised
- They’re causing functional problems
Our approach to warts at SkinWise
We pick the treatment based on wart type, location, size, patient age, and how much the patient (or parent) can tolerate.
Cryotherapy (liquid nitrogen)
Our most common in-clinic treatment. A brief freeze to each wart with liquid nitrogen, repeated every 2–3 weeks for 2–6 sessions. Mild sting during; sometimes a small blister afterwards. Effective for most common warts and many plantar warts. Less suited to very small children who can’t hold still.
Salicylic acid (topical, in-clinic or at-home regimen)
A keratolytic that gradually thins the wart and releases the virus. Effective for plantar warts and selected hand warts when used patiently for 6–12 weeks. Includes a careful protocol: soak the area, pare down the surface, apply the acid, cover overnight. We give a written plan for at-home use and review at follow-ups.
Electrocautery or radiofrequency ablation
For larger, stubborn, or filiform warts. Done under local anaesthetic; precise removal; small wound heals over 1–2 weeks.
Cantharidin
A blistering agent applied in clinic to selected warts. Especially useful for paediatric warts where cryotherapy is poorly tolerated.
Immunotherapy
Approaches that recruit the body’s own immune response against the HPV — useful in multiple, resistant, or recurrent warts:
- Intralesional immunotherapy (e.g. MMR vaccine antigen, tuberculin, candida antigen) — strong evidence for treating recalcitrant warts, including warts at distant sites the agent wasn’t injected into
- Topical immunomodulators (imiquimod) — for selected cases
- Oral zinc in selected resistant patients
- Vitamin D analogues topically in selected cases
Surgical excision
Reserved for selected resistant or large warts when other modalities have failed. Less commonly first-line because surgical scars on hands and feet can be more bothersome than the wart was.
Laser therapy
CO2 or pulsed dye laser for selected stubborn or peripheral warts. Useful adjunct in some cases.
Special situations
- Plantar warts — often need a combined approach (paring + acid + cryo) over several visits
- Periungual warts — slow; sometimes need immunotherapy; nail care matters
- Facial warts (filiform, flat) — gentler modalities (electrocautery for filiform, low-strength cryotherapy or cantharidin for flat)
- Warts in immunocompromised patients — more aggressive treatment, sometimes combined with systemic management
What not to do
- Don’t pick, scratch or pare warts at home. Auto-inoculation is the most common reason warts multiply.
- Don’t shave through warts. The flat-warts-down-the-shin pattern in women is almost always caused by shaving over an initial lesion.
- Don’t share towels, footwear or razors during active warts.
- Don’t use household DIY remedies like duct tape exclusively as a long-term plan — duct-tape occlusion has modest evidence and may help in selected cases, but it’s not a substitute for proper treatment of stubborn warts.
- Don’t apply random home-acid kits to facial warts. Causing pigmentation around a facial wart is worse than the wart was.
- Don’t expect a single treatment to clear everything. Most successful wart treatment is iterative — 2–6 visits, sometimes adjusting modality.
- Don’t panic about cancer. Common skin warts do not become cancer.
- Don’t confuse plantar warts with corns or calluses. The treatment is different; misdiagnosis wastes months.
Frequently asked questions
Why do my warts keep coming back? Common reasons: small residual virus in the original treatment area, re-exposure from another wart on the same patient, undiagnosed warts elsewhere on the body, or an immune system that hasn’t mounted a clearing response. Combining treatments (e.g. cryotherapy + immunotherapy) often resolves this.
Are warts contagious to my family? Yes, mildly — particularly through shared towels, bath mats and direct skin contact. Most healthy adults don’t catch warts from a passing contact, but children and people with weakened skin barriers are more susceptible.
Will treatment leave a scar? Most treatments heal without significant scarring. Aggressive techniques or large warts can leave small pigmented marks for weeks to months — these usually fade in Indian skin with sunscreen and time.
Can I treat warts at home with apple cider vinegar / garlic / banana peel? Some patients see improvement; many don’t. The principle (mild irritation triggering immune attention) has some merit, but the rate of skin burns and post-inflammatory pigmentation from poorly controlled home remedies is high. We don’t recommend them as a first approach.
How long until my warts are gone? For a typical hand wart, 2–4 cryotherapy sessions over 6–10 weeks. For plantar warts, often 8–16 weeks of combined treatment. For multiple or stubborn warts, longer — sometimes 3–6 months.
Are warts a sign of weak immunity? Not in most patients. Healthy people get warts. Significantly immunocompromised patients (HIV, organ transplant, certain medications) do get more extensive warts.
My child has warts on their hands — will they spread to their face? Possibly, if the child touches their face or scratches the warts and then their face. Discourage picking and biting, keep nails short.
Are these the same as the warts that cause cervical cancer? No. Common skin warts are caused by HPV subtypes that don’t cause cancer. Cervical-cancer-related HPV subtypes are different and primarily transmitted sexually.
What about the HPV vaccine — will it clear my existing warts? The vaccine prevents future infection by the subtypes it covers (mainly cancer-associated and genital wart subtypes). It does not clear common skin warts already established.
Where to go from here
If you have warts that are spreading, painful, in a visible location, or that haven’t budged after several months of over-the-counter treatment — book a consultation. Bring photos of each location and a list of anything you’ve already tried.
For warts on or around the nails, see our nail-infections guide for the broader picture.
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