Warts and verrucas are caused by the human papillomavirus (HPV). HPV is a very common virus that can affect the skin and mucous membranes. There are over 100 different types of HPV, and some can cause warts and verrucas.
Warts are usually skin-colored bumps that can appear anywhere on the body, but are most common on the fingers, hands, and feet. Verrucas are also caused by HPV, but they typically appear on the soles of the feet and are usually gray or white.
It is believed that HPV is spread through direct contact with an infected person, such as touching a wart or verruca, or coming into contact with someone else's skin or mucous membranes. It is also possible to contract HPV through contact with contaminated surfaces like floors and towels.
Although most people with HPV don't experience any symptoms, some may develop warts or verrucas. These can range from small, painless bumps to large, painful growths. They can also be itchy or bothersome.
In some cases, warts or verrucas may go away on their own, but others may need to be treated with medications or other treatments like cryotherapy. It is also possible for warts or verrucas to spread to other parts of the body or to other people. For this reason, it is important to practice good hygiene and avoid contact with those who are infected.