HPV is known to be the leading cause of genital warts, and can also cause multiple types of cancer depending on what type of HPV you acquire. Since there are rarely ever any symptoms, why worry about it? Though HPV may not show symptoms, it could be working on creating more severe damage. HPV has been linked to causing abnormal cell changes, which can cause multiple types of cancers depending on the type (types 6, 11, 16, and 18 are responsible for most HPV-related cancers). Cervical, penile, and anal cancer are the most common forms of cancer caused by HPV. Fortunately, cancer is uncommon with HPV and unsightly genital warts are much more likely.