A plantar wart is a viral skin infection caused by the human papillomavirus (HPV). It appears on the soles of the feet, especially in areas exposed to pressure or friction. The virus enters through tiny breaks in the skin and thrives in warm, moist environments.
Plantar warts can affect anyone, but they are more common in:
Children and teenagers — their immune systems are still developing, and they often walk barefoot in communal areas
Older adults — thinner, drier skin and reduced immunity
People with weakened immune systems (immune suppression, chronic illness, certain medications)
Individuals with dry, cracked skin
People who frequently use communal spaces such as pools, gyms, and changing rooms
HPV entering through small cuts or weakened skin
Walking barefoot in communal areas
Excess moisture or sweating
Reduced immunity
Pressure and friction pushing the wart deeper into the skin
A small, rough, grainy lesion on the sole of the foot
A hard layer of skin over the wart
Tiny black dots (clotted capillaries)
A “lump” or pebble‑like feeling under the foot
Pain when the area is squeezed from the sides, rather than direct downward pressure
Discomfort when walking or standing
A plantar wart should be assessed or treated when it:
Becomes painful or interferes with walking
Spreads or multiplies
Persists for several months
Develops thick callus over the top
Occurs in people with fragile skin or reduced sensation
Does not respond to basic home care
A podiatrist may use one or a combination of the following treatments:
Debridement
Gentle removal of thickened skin to reduce pressure and improve treatment effectiveness.
Freezing (Cryotherapy)
Controlled cold therapy to damage wart tissue.
Acid Therapy
Medical‑grade acids (e.g., salicylic acid) to gradually break down the wart.
Swift® Microwave Therapy
Uses microwave energy to stimulate the body’s immune response.
Silver Nitrate
A chemical cautery option to destroy wart tissue.
Needling Technique
Introduces the virus deeper into the skin layers to trigger a stronger immune response.
Surgical Removal
Reserved for persistent or resistant warts.
Keep feet clean and dry
Avoid walking barefoot in communal areas
Use protective padding to reduce pressure
Maintain healthy skin to reduce viral entry points
Avoid picking or cutting warts, as this can spread the virus
In children, plantar warts often resolve naturally as their immune system recognises and clears the virus.
Because of this, it is common to wait 3–6 months to allow the body’s immune response to work before considering more invasive treatments, unless the wart is painful or spreading.