The Bottom Line

Plantar warts are rough, hardened growths on the bottom of the foot caused by the human papillomavirus (HPV). They affect 3–5% of the general population and are painful because they grow on a weight-bearing surface. About 30% go away on their own within a year, but most people want treatment to relieve pain faster. Salicylic acid and cryotherapy (freezing) are the most common treatments. See a dermatologist if the wart is spreading, very painful, or not responding to over-the-counter treatment.

What Are Plantar Warts?

Plantar warts (also called verrucae plantares) are non-cancerous skin growths caused by infection with human papillomavirus (HPV) — specifically types 1, 4, and 63 most commonly. They develop on the sole (plantar surface) of the foot, usually on weight-bearing areas like the ball of the foot and the heel. Because of constant pressure from walking, plantar warts are often pushed inward rather than growing out, which makes them deeper and more painful than warts on other parts of the body.

What Do Plantar Warts Look Like?

Key identifying features:

  • A rough, thickened, callus-like patch of skin on the sole of the foot
  • Black dots (pinpoint specks) in the center — these are tiny blood vessels and are one of the clearest signs it is a wart, not a plain callus
  • Interruption of the normal skin lines (fingerprint-like markings) — a callus preserves these lines; a wart disrupts them
  • Tenderness when you press the sides of the wart (squeezing it sideways hurts more than pressing straight down)
  • Size varies from a few millimeters to over 1 centimeter for a single wart

A mosaic wart is a cluster of many small plantar warts grouped together. These can be harder to treat than single warts.

How Did I Get a Plantar Wart?

HPV enters the foot through tiny cuts, scrapes, or areas of soft skin. The virus thrives in warm, moist environments. Higher-risk situations include:

  • Walking barefoot in locker rooms, pool areas, communal showers, or gyms
  • Having moist feet (athletes, swimmers)
  • Previous warts — having had a wart before increases future risk
  • A weakened immune system (HIV, organ transplant, immunosuppressive drugs)
  • Young age — plantar warts peak in teens and young adults (ages 15–30), with rates of 8–10% in school-age children

Treatment Options

About 30% of plantar warts clear up on their own within a year, and about 50% within 2 years. However, plantar warts cause significant pain for many people and can spread or grow larger without treatment.

Home Treatment

  • Salicylic acid: Available over the counter as gels, liquids, or medicated pads (Compound W, Dr. Scholl's). File the surface gently with an emery board or pumice stone, apply salicylic acid, and cover. Repeat daily for weeks to months. Studies show 70–80% success with consistent use over 12 weeks.
  • Duct tape: Evidence is mixed; some studies show modest benefit. Less effective than salicylic acid.

In-Office Treatments

  • Cryotherapy (liquid nitrogen): The most commonly used in-office treatment. The dermatologist freezes the wart, killing the tissue. Multiple sessions (every 2–4 weeks) are usually needed. Works best combined with salicylic acid between appointments.
  • Intralesional injections: Bleomycin or candida antigen injected directly into the wart is effective for stubborn or large warts.
  • Laser treatment: Pulsed dye laser destroys wart blood vessels. Useful for warts that have not responded to other treatments.
  • Immunotherapy: Topical sensitizers (like squaric acid dibutyl ester) stimulate your immune system to fight the HPV virus. Effective in some patients who have not responded to other methods.
  • Surgical excision or curettage: Cutting out the wart — used for large or persistent warts, but carries risk of a painful scar on the weight-bearing foot surface.

Tips for Living with Plantar Warts

  • Wear flip-flops or water shoes in locker rooms and pool areas to prevent spreading or catching the virus
  • Do not pick at or scratch the wart and then touch other skin — this can spread the virus
  • Keep your wart covered with a bandage when it is being treated
  • Use a separate nail file or pumice stone for the wart — do not use it on healthy skin afterward
  • Moisturize dry, cracked heel skin — skin breaks make HPV entry easier

When to See a Dermatologist

  • The wart is causing significant pain that affects walking or daily activities
  • You have tried over-the-counter salicylic acid for 3 months without improvement
  • The wart is spreading or there are many warts
  • You have diabetes or poor circulation (do not attempt home treatment in this case — see a doctor first)
  • You are not sure if the growth is a wart or something else (such as a corn, callus, or skin cancer)
  • You are immunocompromised — warts can grow aggressively and require stronger treatments

Frequently Asked Questions

Can a plantar wart spread to other people?

Yes, HPV can spread to other people through shared surfaces (floors, shoes, towels) and through direct contact with an active wart. Walking barefoot in shared spaces is the most common way it spreads. The virus can also spread to other areas of your own foot, especially if you pick at a wart.

Is a plantar wart the same as a corn or callus?

No, though they can look similar. The easiest way to tell them apart: warts disrupt the normal skin lines, have black dots in the center, and hurt more when you squeeze them sideways. Corns and calluses preserve the skin line pattern and hurt more when pressed directly. A dermatologist can confirm the diagnosis if you are unsure.

How many treatments will I need?

It depends on the size and how long the wart has been there. Most plantar warts require several rounds of cryotherapy (usually 3–6 sessions) or weeks of consistent salicylic acid application. Larger, older warts take longer. Having a realistic expectation — treatment often takes 2–4 months — helps patients stay consistent.

Will my plantar wart come back after treatment?

It can. HPV remains in the skin even after the visible wart is gone, and recurrence is possible. Wearing protective footwear in shared spaces and keeping skin healthy reduces the chances of recurrence. Some people are simply more susceptible due to immune factors or genetics (about 25% of cases show family clustering).

References

  1. Kwok CS, Holland TJ, Gibbs S. Efficacy of topical treatments for cutaneous warts: a meta-analysis of randomized controlled trials. Br J Dermatol. 2011;165(2):233-246.
  2. Sterling JC, Gibbs S, Haque Hussain SS, et al. British Association of Dermatologists' guidelines for the management of cutaneous warts 2014. Br J Dermatol. 2014;171(4):696-712.
  3. Gibbs S, Harvey I, Sterling JC, Stark R. Local treatments for cutaneous warts. Cochrane Database Syst Rev. 2002;2:CD001781.
  4. Williams HC, Pottier A, Strachan D. The descriptive epidemiology of warts in the general population. Br J Dermatol. 1993;128(4):406-411.
  5. Schultze KK, Jandali AR. Treatment of plantar verrucae with intralesional bleomycin. J Am Acad Dermatol. 2006;55(5):876-877.

Trusted Resources

Always consult a board-certified dermatologist for a diagnosis and treatment plan, especially if you have diabetes, poor circulation, or an immune system condition.