Wart Off is used for the treatment of common (Verruca vulgaris) and plantar warts. Common warts (Verruca vulgaris) are hard, raised lumps with rough surfaces. Any body part can be affected, but the knees and hands are the most common sites. Plantar warts are small, hard bumps, and can have tiny black dots on them. The soles of the feet are most commonly affected.