That rough patch on the sole of your foot might be nothing—but if it’s spreading or has tiny black dots inside, it could be a verruca. Millions of people carry plantar warts without knowing what distinguishes them from simple corns, and the difference matters for treatment. This guide walks you through what verrucas actually look like, using NHS and podiatry sources to help you tell them apart.
Common Location: Soles of feet · Typical Size: 1mm to over 1cm · Key Feature: Tiny black dots under hard skin · Shape: Flat with harder edge · Cause: HPV (human papillomavirus)
Quick snapshot
- Caused by HPV (human papillomavirus) (Footfocus Podiatry)
- Black dots are clotted blood from capillaries — not roots (Bazuka)
- Pain on pinching/side squeeze, not direct pressure (Feet By Pody)
- How long natural resolution takes varies case by case
- Whether home remedies like toothpaste have any proven effect
- Why some verrucas resolve quickly while others persist for years
- Verrucas can persist for months to years without treatment
- Children often clear them faster than adults
- Immunosuppression can extend duration significantly
- If untreated, verrucas may spread to other foot areas
- Mosaic warts (clusters) can form if left alone
- Medical treatment recommended if spreading or painful
These characteristics separate verrucas from other foot lesions in ways that affect treatment decisions.
| Feature | Verruca | Corn |
|---|---|---|
| Cause | HPV (viral) | Friction/pressure |
| Location | Soles of feet, ball of foot | Bony pressure areas, toes |
| Black dots | Present — clotted capillaries | Absent |
| Skin lines | Disrupted — go around lesion | Continuous — pass through |
| Shape | Flat, irregular border, cauliflower | Conical, raised, circular |
| Pain test | Hurts when pinched sideways | Hurts on direct pressure |
| Color | Less uniform, flesh to yellowish | Yellowish with circular shadow |
| Contagious | Yes — skin contact, pools | No |
How can I tell if it’s a verruca?
Identifying a verruca involves checking several visual and physical markers. The NHS describes verrucas as having small black dots like a pepper pot, with skin lines that move around the lesion rather than through it (NHS Lanarkshire).
“These are not roots, as some people believe. The black spots are caused by bleeding.” (Bazuka)
Location on the foot
- Most verrucas appear on the soles or under the ball of the foot — areas that bear weight
- They can spread to toes and occasionally to hands
- Mosaic warts form clusters, often under the ball of the foot (Healthy Feet MK)
Black dots and texture
- The black dots are clotted blood from capillaries, not roots — this is a common misconception (Bazuka)
- Verrucas have a rough, cauliflower-like surface texture
- Skin striations (the natural lines on your foot) are disrupted — they go around the verruca rather than through it (NHS Lanarkshire)
“Verruca appear to have small black dots (like a pepper pot) present in the skin.” (NHS Lanarkshire)
Size and shape
- Verrucas range from about 1mm to over 1cm across (Bazuka)
- They are flat on weight-bearing areas with a harder edge around a softer centre
- On non-weightbearing areas, they may protrude with a more cauliflower-like appearance (Michelle Reynolds Podiatrist)
The pattern here is clear: if you see black dots under hard skin AND the skin lines bend around the lesion, you’re looking at a verruca, not a corn.
The squeeze test separates verrucas from corns. Pinch the lesion sideways — if it hurts, it’s likely a verruca. Press down directly — if it hurts, it’s likely a corn (Feet By Pody).
What can be mistaken for a verruca?
Several other foot conditions mimic verrucas. Getting the diagnosis wrong can lead to inappropriate treatment, particularly with viral warts versus friction-induced growths.
“The black dot is formed by the capillaries bleeding as the virus in your foot hardens.” (Footfocus Podiatry)
Corn vs verruca
- Corns are caused by friction and pressure over bony joints — they are not viral (Feet By Pody)
- Corns have a conical shape with a central core pressing on nerve endings
- Skin lines pass continuously through corns, unlike verrucas where lines go around
- Corns are yellowish with a circular shadow, while verrucas have less uniform colouring
Callus differences
- Calluses are larger areas of thickened skin from repeated pressure — no black dots, no distinct borders
- Seed corns are small clusters on the soles but lack the characteristic black dots of verrucas (Healthy Feet MK)
- Soft corns appear between toes (white/grey, rubbery) — completely different from verrucas
The contagiousness of verrucas makes correct identification essential for preventing spread to others and yourself.
The implication: confusing a viral wart with a friction-induced corn means you may underestimate the risk of transmission and delay appropriate treatment.
What does a verruca look like at the start?
Early-stage verrucas can be subtle. Understanding the progression helps you catch and treat them before they spread.
Early stage appearance
- Small rough patch on the sole, often 1-3mm at first
- No black dots visible yet — these develop as capillaries bleed under pressure
- Skin may feel slightly raised but not yet forming the classic flat shape
- Caused by HPV entering through tiny breaks in the skin (Footfocus Podiatry)
Progression to mature verruca
- Over weeks to months, the lesion expands and flattens under body weight
- Black dots appear as tiny blood vessels thrombose within the wart
- The characteristic harder edge develops around a softer centre
- If untreated, satellite verrucas may appear nearby (Kent Community Health NHS)
The catch is that early verrucas are easiest to treat but hardest to identify. If you notice a new rough patch that doesn’t match a callus pattern, monitor it for the next few weeks.
How do you get rid of a verruca?
Treatment options range from home remedies to professional medical interventions. The choice depends on size, location, pain level, and how long you’ve had the verruca.
Home treatments
- Salicylic acid products (Bazuka, other brands) applied after filing the surface — effective for many cases (Bazuka)
- Duct tape occlusion — covering the verruca for days at a time to suffocate it
- Keep the area dry and clean; avoid picking or filing as this can spread the virus
Professional options
- Cryotherapy (freezing with liquid nitrogen) — done by a GP or podiatrist
- Minor surgery or laser treatment for stubborn verrucas
- Swift (microwave) therapy available at some podiatry clinics
Toothpaste and other unverified home remedies appear in search results, but no clinical evidence supports their effectiveness. Meanwhile, salicylic acid — a readily available over-the-counter treatment — has documented success rates. The temptation for a quick fix often delays evidence-based treatment.
The pattern: the most readily available evidence-based treatment (salicylic acid) gets overlooked in favour of unproven internet remedies.
Can a verruca go away by itself?
Yes — but the timeline varies significantly and depends heavily on age and immune status.
Natural resolution
- Verrucas in children often clear within 1-2 years as the immune system develops a response
- Adult verrucas may persist for 2-5 years or longer without treatment
- Immunosuppressed individuals may struggle to clear verrucas without intervention
When to seek help
- Verruca spreading to multiple areas or increasing in size
- Pain interfering with walking or daily activities
- Verruca appearing in diabetic patients or those with circulatory problems (seek help promptly)
- If you’ve tried over-the-counter treatments for 2-3 months with no improvement (NHS)
What this means: the younger you are, the more reasonable it is to wait and monitor. For adults past 30 with persistent verrucas, professional treatment typically offers faster resolution.
Understanding these distinctions between natural resolution timelines helps set realistic expectations for treatment.
| Attribute | Verruca (Plantar Wart) | Corn |
|---|---|---|
| Cause | HPV viral infection | Friction/pressure |
| Contagious | Yes — direct contact, pools | No |
| Black dots | Present (clotted blood) | Absent |
| Skin lines | Disrupted (go around) | Continuous (through) |
| Pain on direct pressure | Usually no | Yes |
| Pain on sideways pinch | Yes | Usually no |
| Age group | Children common, any age | Adults, elderly |
| Typical location | Sole, ball of foot | Bony prominences, toes |
| Shape | Flat, irregular, cauliflower | Conical, raised, circular |
| Border | Irregular, less defined | Clear circular border |
Treatment steps
Three approaches, from least to most intensive, depending on your situation.
- Step 1 — Watch and wait: Especially for children. Keep the area clean, avoid picking, monitor for spread. Most pediatric verrucas resolve within 2 years.
- Step 2 — Salicylic acid treatment: File the surface gently, apply product, cover. Repeat daily for 4-12 weeks. Do not use on face or genitals.
- Step 3 — See a podiatrist or GP: If OTC treatment fails after 2-3 months, or if pain is significant. Options include cryotherapy, laser treatment, or prescription-strength treatments.
Related reading: Shoe Repair Near Me Ireland · Walking Sandals Women Ireland
Verrucas differ from corns through tiny black dots and disrupted skin lines, as explored in depth alongside verruca causes and symptoms in reliable guides.
Frequently asked questions
Do verrucas hurt?
Not always. Verrucas typically hurt when pinched sideways (squeeze test) but may not be painful on direct standing pressure. Corns are usually tender on direct pressure. If your foot lesion is painful when you squeeze it, a verruca is more likely.
Are verrucas dangerous?
Generally no, in healthy individuals. They are benign viral growths. However, they can spread to other body parts or to other people, and they can be more problematic in people with diabetes, immunosuppression, or poor circulation. In those cases, seek medical advice promptly.
What triggers verrucas?
HPV enters through small cuts, scrapes, or breaks in the skin. Public pool areas, communal showers, and sweaty feet create ideal conditions. Walking barefoot in these environments increases risk. Minor skin damage from tight shoes or pedicures can also create entry points.
What does a verruca look like on your toe?
Toe verrucas may appear on the top, sides, or bottom of toes. They show the same characteristics: rough texture, possible black dots, and disrupted skin lines. On toes, they may be more raised than those on the sole because toes bear less body weight, allowing the wart to grow outward rather than flattening.
Can toothpaste get rid of verrucas?
No clinical evidence supports toothpaste as an effective verruca treatment. While some anecdotal success stories circulate online, no peer-reviewed research confirms efficacy. Salicylic acid products have documented success rates and are widely available.
How to get rid of verrucas overnight?
No treatment clears a verruca overnight. Even professional treatments like cryotherapy require multiple sessions over weeks. Quick-fix claims online are not supported by evidence. Realistic timelines: OTC treatment takes 4-12 weeks; professional treatment takes 2-6 months in most cases.
How to tell if a verruca is dying?
Signs of resolution include: the black dots may darken before disappearing, the lesion may become less defined, surrounding skin returns to normal texture, and the hardened edge softens. If treatment is working, you should see gradual shrinking over several weeks rather than sudden changes.
Sophie Larkin is Music News Editor at PlaylisterUK.co.uk, covering artist announcements, releases, charts, labels, streaming platforms and the UK music industry.