Learn what causes warts, their types, and symptoms. Explore effective wart treatment options, including topical treatments and surgical removal of warts. Warts are small, grainy, noncancerous skin growths caused by human papillomavirus (HPV). The virus can be transmitted through direct and indirect contact, such as touching contaminated skin or articles. Warts are a kind of skin infection that is caused by the human papillomavirus (HPV). Know about it's causes, symptoms, warts removal and treatments. Warts Warts are skin growths that develop due to strains of the human papillomavirus (HPV). There are several types, like plantar warts, common warts and flat warts. Warts can be stubborn, but many treatment options can help get rid of them.