Verrucae, also known as plantar warts, are a common contagious infection caused by certain strains of the human papillomavirus (HPV). These viruses infect the epidermis particularly when the skin is compromised, through micro abrasions, allowing the virus to enter. It then triggers excessive keratin production, leading to the thickened, rough lesion typical of a wart. Verrucae are most commonly found on the soles of the feet, where pressure causes them to grow inward, sometimes resulting in pain.
They are spread through direct or indirect contact particularly in warm, moist environments such as swimming pools or changing rooms. They are most common in children, adolescents and individuals with a weakened immune system, but anyone can develop verrucae.
The body’s immune system may eventually clear the virus, but this process can take months or even years. For persistent or painful verrucae, treatment is recommended to stimulate an immune response or physically remove the infected tissue.