Warts is a sexually transmitted disease caused by human papillomavirus infection, the infection rate is high, clinical mainly through sexual contact, followed by indirect contact, mother and child transmission and other ways of transmission. 1. Sexual transmission: the most important way of transmission. 2. Indirect contact: contact with contaminated household items, such as underwear, bed sheets, bath towels, toilet bowls, etc., may also cause cross-infection. 3. Mother-to-child transmission: pregnant women with acromegaly, in the process of delivery of the fetus through the birth canal, may cause cross-infection.