Warts are caused by a common viral infection, the human papillomavirus (HPV). Most resolve spontaneously within a year or two. They may vary in appearance depending on the types of HPV, the anatomical site involved and the host immune response. They often have small black dots, representing coagulated capillaries, particularly evident on paring.
Common hand warts

Deep plantar wart (verruca)
- May be tender on pressure

Mosaic plantar wart
- May be slow to resolve in comparison to other warts

Plane wart
- Flat topped pink or pale brown. Often on face or other sun exposed sites

Filiform facial wart
