Plantar Warts: What They Are, How You Get Them, and When to Seek Treatment

Plantar warts are one of the most common foot complaints seen in podiatry clinics — and also one of the most misunderstood. Many people put off seeking treatment, either because they are unsure whether what they have is actually a wart, or because they assume it will go away on its own. Sometimes it does. Often, it does not.

Here is what you need to know about plantar warts, how to identify them, and when professional treatment is the right call.

What Is a Plantar Wart?

A plantar wart — also known as a verruca plantaris — is a small, non-cancerous growth on the skin of the foot caused by the human papillomavirus (HPV). The term "plantar" simply refers to the sole of the foot, which is where these warts typically appear.

Unlike warts on other parts of the body, plantar warts are often pushed inward by the pressure of walking and standing. This gives them a flat appearance on the surface, though the growth extends deeper into the skin — which is why they can be painful.

What Do They Look Like?

Plantar warts can sometimes be mistaken for corns or calluses, so knowing what to look for matters.

Common characteristics include:

• A rough, grainy patch of skin on the sole of the foot, heel, or toes
• A thickened area of skin with a small black dot or cluster of dots at the centre — these are tiny clotted blood vessels, sometimes called "wart seeds"
• Pain or tenderness when direct pressure is applied, particularly when squeezing the sides of the wart
• Disruption of the natural skin lines (fingerprint-like ridges), which are interrupted by the wart tissue

A corn or callus, by contrast, will not have black dots and will not disrupt the skin lines.

How Do You Get a Plantar Wart?

Plantar warts are caused by specific strains of HPV that infect the outer layer of skin. The virus thrives in warm, moist environments and is commonly picked up in places such as:

• Public swimming pools and pool deck areas
• Communal showers and change rooms
• Gymnasiums and yoga studios
• Shared towels or footwear

The virus enters through tiny cuts, breaks, or areas of softened skin on the bottom of the foot. Not everyone who is exposed will develop a wart — individual immune response plays a significant role. Children, teenagers, and people with weakened immune systems tend to be more susceptible.

Will a Plantar Wart Go Away on Its Own?

In some cases, yes. The immune system can eventually recognise and clear the HPV virus, causing the wart to resolve without treatment. This process can take anywhere from several months to a few years.

However, waiting is not always the best approach. Without treatment, plantar warts can:

• Grow larger or spread to other areas of the foot
• Cluster into a mosaic pattern that is harder to treat
• Cause increasing pain that affects the way you walk
• Spread to other people through shared surfaces

If the wart is painful, growing, or has been present for several months without change, professional treatment is advisable.

How Are Plantar Warts Treated?

There are several effective treatment options available through a podiatrist, depending on the size, location, and duration of the wart.

• Debridement – The podiatrist removes the thickened overlying skin to expose the wart tissue and allow treatment agents to penetrate more effectively
• Salicylic acid – A strong topical acid applied to the wart over multiple sessions to break down the infected skin gradually
• Cryotherapy – The application of liquid nitrogen to freeze and destroy the wart tissue
• Swift microwave therapy – A newer, highly effective treatment that uses microwave energy to target the HPV virus directly within the skin, triggering an immune response
• Needling – A procedure where the wart is punctured multiple times under local anaesthetic to stimulate the immune system to recognise and attack the virus

Your podiatrist will recommend the most appropriate treatment based on your individual circumstances, including the age of the patient, pain levels, and previous treatment history.

Can You Prevent Plantar Warts?

While there is no guaranteed way to prevent plantar warts, you can significantly reduce your risk by:

• Wearing thongs or sandals in communal wet areas such as pool decks and change rooms
• Keeping your feet clean and dry
• Avoiding walking barefoot in public spaces
• Not sharing towels, socks, or footwear with others
• Covering any cuts or abrasions on your feet before entering shared facilities
• Avoiding touching or picking at existing warts to prevent spread

When Should You See a Podiatrist?

Seek professional care if:

• The wart is causing pain that affects your walking or daily activity
• The wart has been present for more than two to three months without improvement
• You notice the wart spreading or growing in size
• You have diabetes or a compromised immune system — any foot lesion in these cases warrants prompt attention
• Over-the-counter treatments have not produced results after several weeks of consistent use

The Bottom Line

Plantar warts are a common, treatable foot condition — but they should not be ignored, especially when they are causing pain or showing signs of spreading. With the right professional treatment, most plantar warts can be resolved effectively, allowing you to get back on your feet comfortably and confidently.

Dealing with a persistent plantar wart? Book an appointment with our team online or call (03) 8358 9929.

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