Warts are non-cancerous skin growths caused by a viral infection in the top layer of the skin. Viruses that cause warts are called human papillomavirus (HPV). Warts are usually skin-colored and feel rough to the touch, but they can be dark, flat and smooth. There are three common types of warts including:
Treatment for warts includes cryotherapy, application of a blistering solution, injections, and surgical removal.