Plantar warts are caused by human papillomavirus infection and can be spread by direct or indirect contact. 1. Direct contact: direct foot contact with a plantar wart patient’s skin lesions can cause the virus to spread. 2. Indirect contact: sharing shoes and socks with the patient; or touching the affected area with hands and then touching other parts of the body can also lead to the spread of the virus itself. The population is generally susceptible to the disease, and immunocompromised and traumatized people are more likely to be infected with human papillomavirus and develop skin lesions. If you have plantar warts, you need to seek medical examination and treatment in a timely manner, and actively treat them to avoid the spread of skin lesions.