Warts are small, self-limited tumors caused by one of over 100 types of human papillomaviruses (HPV).
The clinical forms of warts include common warts, flat warts, plantar warts, periungual warts, filiform warts, and genital warts.
Warts typically disappear on their own with time, but it may take years. Warts respond variably to a variety of treatment measures.