Filiform warts are not cancer; they are caused by a virus, which means they are a viral infection that manifests as a skin disease. The pathogen responsible is the human papillomavirus, making it a benign skin condition. It is also important to note that filiform warts are different from skin tags, and many people confuse the two. In fact, these are two completely different skin conditions: filiform warts are an infectious disease, while skin tags are a benign tumor of the skin. Although both can be treated with lasers, skin tags only affect appearance, whereas filiform warts are contagious and can be transmitted to oneself or others. Therefore, if you find filiform warts, it is best to seek laser treatment at a hospital as soon as possible.