Warts are often skin-colored and feel rough, but they can be dark (brown or gray-black), flat, and smooth. Learn more about the types of warts, signs, causes, and treatments here. Discover the different types of warts, including common warts, plantar warts, flat warts, filiform warts, mosaic warts, and genital warts. Learn about their causes, treatments and prevention tips. What is a viral wart? A viral wart is a very common benign lesion caused by infection with human papillomavirus (HPV). Viral warts can be classified by site as being cutaneous or mucosal as the HPV types are quite distinct [see Anogenital wart and Sexually acquired human papillomavirus for further information on mucosal HPV infection]. Learn about warts, small growths on the skin caused by HPV virus, and how to prevent, diagnose, and treat them. Find answers to common questions and book an appointment with a doctor.
