Plantar warts are viral lesions that develop on the soles of the feet following infection with the Human Papilloma Virus (HPV). While common, they can be stubborn and slow to resolve due to the way the virus interacts with the outer layers of the skin.

The Virus Behind Plantar Warts



HPV is a group of viruses with more than 150 identified subtypes. Only a small number are typically responsible for plantar warts, with these strains entering the skin through microscopic cuts or abrasions. Over time, this leads to the formation of a wart on the sole of the foot.

According to DermNet NZ, plantar warts are classified as cutaneous viral warts and commonly develop within thickened, keratinised skin on the sole, which contributes to discomfort and thickening under pressure.

How Plantar Warts Are Transmitted

Plantar warts are contagious and can spread through:

• Direct contact with an existing wart
• Autoinoculation, where the virus spreads from one area of skin to another
• Contact with contaminated surfaces in shared environments

The Cleveland Clinic explains that HPV is commonly spread through contact with infected skin or surfaces, particularly when the skin barrier is compromised. Warm, moist areas such as swimming pools, communal showers and change rooms can increase the risk of exposure.

Skin that is softened by moisture or weakened by dryness is more susceptible, as small breaks in the skin allow easier viral entry. Symptoms may not appear immediately, as the virus can remain dormant for months before a wart becomes visible.

Why Plantar Warts Can Persist

HPV infects the upper layers of the epidermis, an area with limited blood supply and fewer immune cells. This makes it harder for the immune system to recognise and clear the virus.

It is important to note that because HPV does not strongly trigger an immune response, plantar warts can persist for long periods without treatment, particularly if pressure and friction continue during walking.

Why Assessment Matters



Plantar warts can vary significantly depending on the HPV strain involved and how long the infection has been present. Professional assessment helps ensure the lesion is correctly identified and managed appropriately, particularly if it is painful, spreading, or not responding to home care.

Plantar warts may persist without targeted management. If your wart is painful, spreading or not responding to treatment, podiatry assessment can help manage the condition and reduce the risk of transmission.



If you’re unsure about a lesion on your foot or experiencing an ongoing plantar wart, book in with us now at Merewether Podiatry or New Lambton Podiatry for professional assessment and tailored care.