Plantar warts cause infection of certain human papillomaviruses (HPV) that enter the skin of the soles of the feet.
The simple fact of being in contact with the virus does not systematically mean that there is infection and formation of plantar warts. For contagion to occur, several factors must be brought together. For example, a weakened immune system and contact with a certain type of HPV virus.
Even in case of contagion, the wart can be delayed for weeks or even months .
For contagion, simple contact with the skin is not enough: the virus needs a "front door" to get into the sole of the foot, for example:
- Cracks in dry, rough skin,
- Small scratches or cuts,
- Softened skin (moisture, for example after a long bath).
Sweaty feet can also be involved by promoting the appearance of plantar warts.
Plantar warts viruses evolve particularly well in hot and humid environments . The risk of contagion is therefore very high in swimming pools, changing rooms or showers. T ongs or sandals can protect against infection and thus plantar warts.Only certain types of HPV (especially type 1, 2, 4, 60 or 63 viruses) cause warts to the feet. Warts caused by other viruses occur in other areas of the skin or in the mucous membranes (eg, genital warts). In total, there are more than 110 types of these types of HPV viruses.