Warts and verrucas
Most people will have warts at some point in their life. They tend to affect children and teenagers more than adults.
Warts are caused by certain strains of the human papilloma virus (HPV).
More images of warts
Source: dermnetnz.org
Source: dermnetnz.org
Warts are caused by certain strains of the human papilloma virus (HPV).
More images of warts
Source: dermnetnz.org
Source: dermnetnz.org
There are lots of different strains of HPV and these cause different types of warts.
HPV causes too much keratin (a hard protein) to develop in the top skin layer (epidermis). The extra keratin produces the rough, hard texture of a wart.