A wart, medically known as a common wart, is an infection caused by the human papilloma virus. Whether or not a wart is contagious after it breaks down and bleeds cannot be generalized, but depends on whether or not there is a break in the surface of the skin that comes into contact with it. If there is a break or wound in the epidermis, the wart will easily become infected when it comes in contact with the pus flowing from the wart. The wart is a pea-sized or larger grayish-brown, brown or skin-colored papule with a rough, hard surface that may be papillated and has a 90% natural clearance rate within 5 years. If the wart has broken down it needs to be actively stopped from bleeding and treated with pressure. Pay attention to local skin disinfection care to prevent secondary infection and it is recommended to give local iodophor solution or povidone iodine solution to achieve the purpose of cleaning the wound. When there is no local inflammation or bleeding, normal skin color has been restored and there is no other discomfort, you should consider visiting a dermatology clinic for liquid nitrogen freezing, laser or surgical excision treatment to avoid further evolution. The wart can also be prevented by some daily methods, such as paying attention to protecting the skin, ensuring that it is dry and clean, avoiding humidity and sweating, and skin trauma, which can effectively prevent viral infections from causing the disease.