If you’ve spotted a rough, thickened patch of skin on your foot with tiny black dots inside it, you’re probably dealing with a wart – also known as a verruca. It’s one of the most common conditions we see at our clinic, and one of the most misunderstood. Patients often try a pharmacy treatment, wait a few weeks, and end up more confused than when they started.
This guide brings together everything you need to know about warts: what they are, why they show up, how to tell them apart from corns or calluses, the types you might encounter, and the treatment approaches available in Singapore today.
What Exactly Is a Wart?
A wart is a benign (non-cancerous) skin growth caused by the human papillomavirus (HPV). More than 100 strains of HPV have been identified, and only a small subset of these strains is linked to cancer risk – the strains responsible for common skin and foot warts are not among them. So while a wart is a genuine viral infection and shouldn’t be ignored, it is, in itself, harmless.
It’s also more common than most people realise. Roughly 7-12% of people who carry HPV go on to develop a plantar wart specifically, and the condition ranks among the most frequently seen presentations in general dermatology and podiatry practice worldwide.
How Do Warts Present?
Warts don’t always look the same, but there are a few tell-tale signs podiatrists look for:
- Rough, thickened skin at the site of the lesion
- Small black pinpoint dots within the thickened area – clotted blood vessels, and one of the clearest ways to distinguish a wart from a corn or callus
- A cloudy, cauliflower-like texture within the hardened skin
- Tenderness or pain when squeezed from the sides (rather than pressed directly on top, which is more typical of a corn)
What Causes a Wart to Form?
HPV usually enters the body through tiny breaks in the skin – small cuts, scrapes, or areas softened by moisture. It’s contagious and spreads through:
- Direct contact with someone who has an active wart
- Indirect contact, such as sharing shoes, socks, or nail tools
- Walking barefoot in communal areas: shared locker rooms, showers, and swimming pools are classic hotspots, since the virus thrives in warm, moist environments and the soles of the feet are particularly vulnerable in places where people commonly go barefoot. Singapore’s humidity and gym-and-pool culture make this an especially relevant risk locally.
Once the virus enters the skin, it doesn’t necessarily cause a visible wart right away – it can lie dormant, and symptoms typically take three to four months to appear, though in some cases a wart has surfaced up to two years after initial contact. It tends to become active when your immune system is weakened, at which point the virus starts producing more particles within the skin cells, eventually forming the wart you can see and feel.
Why Doesn’t Everyone Who’s Exposed Get a Wart?
Not everyone who comes into contact with HPV develops a wart – your immune system plays a major role in whether an infection takes hold. This is also why age matters: plantar warts are most commonly seen in teenagers and young adults, while common warts peak in incidence between the ages of 12 and 16, likely because younger immune systems haven’t yet built up resistance to the many HPV strains circulating in daily life.
The encouraging flip side: in around 90% of cases, the immune system clears the underlying HPV infection within about two years, which is why some warts do eventually resolve without treatment, though “eventually” can mean months of discomfort in the meantime, and plantar warts in particular are far less likely to resolve on their own once established.
The Different Types of Warts
Warts vary quite a bit depending on where they grow, how they behave, and even which HPV strain is behind them:
- Plantar warts: on the sole of the foot, pushed inward by walking pressure; most often caused by HPV types 1, 2, 4, 27, and 57
- Mosaic warts: clusters of plantar warts merged into a larger patch, associated with HPV type 2
- Periungual and subungual warts: growing around or beneath the nail
- Common warts (verruca vulgaris): raised, dome-shaped, more often on the hands
- Flat warts (verruca plana): smaller, smoother, often mistaken for ordinary skin blemishes, and known to appear in large numbers, sometimes 20 to 100 at a time
- Filiform warts: thread-like, often around the face
- Genital warts: a separate category requiring its own clinical pathway
Most warts show up on the soles of the feet, fingers, face, and genitals – anywhere skin is thin, frequently exposed to friction, or prone to minor breaks. We’ve written a more detailed breakdown of each type, including how to visually tell them apart, in Not All Warts Are the Same – Here’s What You Need to Know.
How Are Warts Treated?
There’s no single treatment that works for every wart, which is exactly why so many patients feel like they’ve “tried everything” before seeing a podiatrist. The right approach depends on the wart’s type, depth, size, and how long it’s been present. Options available through a podiatry wart specialist include:
- Keratolytic treatment: gradually softens and breaks down thickened skin
- Cryotherapy: controlled freezing to destroy wart tissue and trigger an immune response
- Immunotherapy: stimulates the body’s own immune system to fight the virus
- Electrocauterisation: uses heat energy to remove wart tissue
- Chemical treatment: medical-grade solutions that disrupt infected cells
- Mechanical reduction (debridement): careful removal of thickened surface layers
- Combination therapy: blending several of the above for a more complete result
The underlying goal is always the same: remove enough visible wart tissue to let the body’s immune system reach and fight the underlying virus – something it naturally struggles to do on its own at the skin’s surface. We go into far more depth on each option, and how they’re combined, in Wart Treatments Explained – What Are Your Options?.
How Long Does It Take to Clear a Wart?
Timelines vary by location, size, and depth:
- Plantar warts: typically 6-7 treatment sessions, roughly 3-6 months if caught early, though established, deeper warts can take up to a year or more
- Finger warts: usually 1-2 sessions, around 2 months
- Facial warts: usually 1-2 sessions, around 2 months
Because warts vary so much in size, depth, and duration, these are general guides rather than guarantees, which is exactly why an early clinical assessment makes such a difference to how quickly, and completely, a wart resolves.
Frequently Asked Questions
Will treatment be painful?
Since the goal of treatment is to trigger an immune response at the skin’s surface, it’s common for a blister to form afterward. This can cause some mild discomfort, but it’s generally short-lived and a sign the treatment is working.
Why do plantar warts take so much longer to treat than warts elsewhere?
Warts on the face or fingers tend to sit closer to the surface. Plantar warts are pushed deeper into the foot by the pressure of everyday walking and standing, and a layer of hardened skin often builds up over them, acting as a barrier to treatment. The combination of depth and protective callus is what makes plantar warts a longer process.
Do you only treat plantar warts?
No. At DC Podiatry, we manage warts across the feet, fingers, and face except genital warts. We also have a doctor on-site, which means a wider range of treatment options is available when a case calls for it.
Can an untreated wart get worse?
Warts are benign, but picking or cutting one can break the skin and allow bacteria in, leading to a secondary infection requiring antibiotics. This is one more reason to seek professional wart removal rather than DIY methods.
Why Warts Sometimes Come Back and Why Home Treatment Often Falls Short
Two questions come up almost as often as “what is this thing on my foot”: why did it come back after I thought it was gone, and why didn’t my pharmacy treatment work? Both have specific, well-understood answers – largely related to how deep plantar warts sit, how thick the skin protecting them is, and how easily the virus can linger beneath the surface even after visible improvement. We’ve covered these in detail in Why Do Warts Come Back? and Why Home Wart Treatments Often Fail.
When to See a Podiatrist
If you’ve noticed a rough patch with pinpoint dark spots, discomfort when walking, or a lesion that hasn’t responded to over-the-counter treatment after a few weeks, it’s worth getting a proper clinical assessment rather than continuing to guess. Warts are very treatable but the right treatment starts with the right diagnosis.
At DC Podiatry, our principal podiatrist Leighton Cheng specialises in identifying and managing all types of warts, from straightforward plantar lesions to more complex mosaic and periungual presentations. We’re located right in the heart of Orchard, at 1 Grange Rd, #10-03 Orchard Building.
Book your wart removal consultation at dcpodiatry.com.sg or reach us on WhatsApp at +65 9366 8855. The sooner a wart is properly identified, the simpler everything that follows tends to be.
