Common warts can be contagious through skin contact. Common warts, also known as verruca vulgaris, are caused by the human papillomavirus, abbreviated as HPV. Theoretically, common warts can be contagious through close contact, but transmission is not guaranteed upon skin contact and depends on each individual's resistance to the virus. When affected by common warts, it's important to enhance the cleanliness of the affected skin area, and also to disinfect clothing and the surrounding environment. Treatment can be supported by using immunomodulators among other symptomatic therapies. The primary treatment for common warts is physical removal methods, such as liquid nitrogen freezing or carbon dioxide laser treatments to remove the warts, and topical application of interferon gel can also be used.