Foot Health Glossary

Plantar wart

Verruca plantaris
Medically reviewed · Hottinger Podologie, ZurichUpdated: July 2026

The plantar wart (verruca plantaris) is a skin growth on the sole caused by human papillomaviruses (HPV). Walking pressure makes it grow inward like a thorn, and it can sting with every step. Typical are small dark dots, tiny capillaries, under the callus layer.

Infection and course

The virus is picked up wherever many people walk barefoot: pools, saunas, changing rooms. Warts can persist for months, multiply, or heal spontaneously. They become stubborn when pressure and a moist environment keep feeding them.

What you can do yourself

Bathing shoes in barefoot zones, keep feet dry, do not scratch the wart open (risk of spreading), use your own towels. Over-the-counter remedies demand patience and discipline, and with diabetes they do not belong in self-treatment.

When to see a podiatrist

If the wart hurts, spreads, or you are unsure whether it is a corn instead. Modern methods are available in the practice, including Swift® microwave therapy, which deliberately triggers the immune response against the virus. We advise you on what makes sense in your case.

Did you know?

Plantar warts do not grow outward but inward: walking pressure presses them into the sole like a thorn. That is why they hurt when you walk, while warts on the hands usually grow painlessly.

Common questions
Why does the wart keep coming back?
Because the virus can persist in the skin, and pressure and moisture play into its hands. Consistent treatment plus dry feet and pressure relief improve the odds considerably.
Related terms
Sources & further reading
Hottinger Podologie · Zurich

Concerns about your feet, skin or nails?

We take a precise look: discreet, by appointment, between Kreuzplatz and Kunsthaus. We usually reply within one working day.

AW
Angelika WinklbauerPodiatry & medical foot care
This entry provides general information and does not replace an individual examination.