Infections - Bacterial & Viral
Plantar Warts
WHAT IS IT
A wart on the sole of the foot
HOW COMMON
Very common, especially in youth
CONTAGIOUS?
Yes — spreads via a virus in damp areas
CURABLE?
Yes, though they can be stubborn
What Is It?
A plantar wart is a small, rough growth on the sole of the foot caused by a common virus. Because you walk on it, it grows inward and can feel like a pebble in your shoe. Warts are harmless but can be uncomfortable and may spread or multiply.
Signs & Symptoms
-
A rough, grainy growth on the sole of the foot
-
Tiny black dots ("wart seeds" — small clotted vessels)
-
Pain or tenderness when walking or standing
-
A callus over a spot where the wart grew inward
-
Interruption of normal skin lines across the surface
Why Does It Happen?
Plantar warts are caused by the human papillomavirus (HPV), which enters through tiny breaks in the skin. The virus thrives in warm, damp places like pool decks, locker rooms, and communal showers. Walking barefoot in these areas raises the risk. They can spread to other spots on your own foot or to other people.
Treatment Options
Many plantar warts fade on their own over time, but treatment speeds clearance and eases discomfort. Persistence is key — several treatments are often needed.
SALICYLIC ACID
Over-the-counter or prescription acid applied daily to peel the wart away.
CRYOTHERAPY
Freezing the wart with liquid nitrogen, often over several visits.
OCCLUSION & FILING
Covering and gently filing down the wart to help treatments work.
IN-OFFICE OPTIONS
Stronger acids, minor procedures, or immune-based therapy if stubborn.
Tips for Managing It at Home
-
Don't go barefoot in locker rooms, pools, or shared showers
-
Avoid picking at the wart or sharing towels and shoes
-
Keep feet clean and dry; change damp socks promptly
-
Be patient and consistent — clearance can take weeks to months
When to Call Your Provider
-
The wart is painful, spreading, or not improving
-
You have diabetes or poor circulation in your feet
-
The growth bleeds, changes color, or looks unusual
-
You're unsure whether it's a wart or a callus/corn
Sources & further reading
The information in this handout is based on general dermatology guidance from the reputable organizations below. These links are provided for patients who wish to read more from trusted sources.
American Academy of Dermatology (AAD). Warts: Overview. https://www.aad.org/public/diseases/a-z/warts-overview
DermNet. Viral Wart (Verruca). https://dermnetnz.org/topics/viral-wart
MSD/Merck Manual. Warts. https://www.msdmanuals.com/professional/dermatologic-disorders/viral-skin-diseases/warts
This handout is for general education and does not replace advice from your own provider. Always follow your provider’s specific instructions.
← Back to all handouts