Warts are a very common skin condition. They frequently appear as single lesions or small groups. This is a photograph of an unusually severe and large wart. Periungual warts are common warts. They are located around the fingernails and may grow under the fingernails.
Periungual warts are difficult to treat.
Multiple treatments are available but failure rates are high. This is an unusually severe case. Warts are caused by a virus infection. The warts on the toes in this photograph are typical of warts on the feet. A person can spread warts from one location on the body to another by a process called autoinoculation.