The warts c ommonly seen on the skin are caused by a viral infection. The culprit is one of the HPVs (human papillomaviruses) that can be spread from person to person or be acquired through contact with a contaminated surface.Over 100 types of HPVs have been identified that infect skin or mucous membranes, depending on the virus type. HPV types that infect skin lead to the development of common skin warts Warts are skin growths that appear on areas of the skin and body that are infected with a virus in the human papillomavirus (HPV) family of viruses . There are more than 100 different HPV types. Verruca is the medical term for warts. The main symptom of human papillomavirus infection is that it triggers excessive growth of skin cells. This makes affected areas appear thickened, hard, and rough. Some types of warts are flat and smooth. You can get warts on any part of your body, but they commonly appear on the hands and feet. Warts are be...