Filiform warts are caused by human papillomavirus (HPV), which is contagious. You can spread the warts by skin contact, especially if the skin is broken. While they aren’t cancerous, they can cause discomfort. Learn more about the symptoms, treatment, and prevention of filiform warts.
Periungual warts commonly affect children and young adults, especially if they are nail biters. These warts are difficult to treat, but it helps to start treatment as soon as you identify the warts. Like all warts, periungual warts are caused by the human papilloma virus (HPV).
Plantar warts and palmer warts are noncancerous skin growths, caused by a viral infection in the top layer of the skin. The culprit is a strain of virus called human papillomavirus or HPV. Many strains of the virus exist, and those that cause common warts on the hands and feet are not the same strains of HPV that cause genital warts.