This video tells us about skin warts and their types and causes. Warts and verrucas are small, rough lumps or growths on your skin caused by the human papillomavirus (HPV). TIMELINE: 0:03 Introduction 2:03 Types (Vulgaris) 3:09 Verruca Plantaris 3:14 Verruca Plana 4:49 Filiform Warts 5:20 Treatment 6:30 Refractory case 7:23 End