Pubic lice is a parasite that lives in human hair and is called pubic lice because it is commonly found on the pubic area. It is transmitted mainly through sexual intercourse, or contact with contaminated clothing and beds. Generally through the patient’s symptoms can be judged whether or not to suffer from pubic lice. I, through the symptoms and examination to determine the presence of pubic lice 1, perineal itching, itching in the evening, mainly confined to between the pubic bone, can also be infected through bedding and clothing to the abdomen, armpits, eyelashes and calves out of hair, causing itching; 2, pubic hair roots can be found rust-colored or reddish-brown oval eggs; and slow-moving pubic lice, or see half of the lice burrowed into the skin, half exposed outside the skin; 3, pubic 3. red rash, papule, blood crust or bruises appear on the pubic area; 4. rust-colored powdered or granular lice feces are found on the patient’s underwear; 5. the diagnosis is clarified by microscopic examination in the dermatology department of the hospital. Second, the treatment of pubic lice patients suffering from pubic lice need to be actively treated by the following methods. 1, shave the pubic hair and perianal hair; 2, steam or boil the contaminated clothing, sheets, covers to kill the eggs and adult lice; 3, the external use of drugs such as Lindane lotion, 25% benzyl benzoate emulsion; 4, if the stimulation of infection, erythromycin and other drugs available orally, topical cream, anti-bacterial infection. Third, the prevention of pubic lice pubic lice can be actively prevented from the following aspects: 1, control the source of infection: if found pubic lice patients, should track the source of infection, especially for their sexual partners, should be examined and treated; 2, cut off the transmission route: avoid unclean sexual intercourse; 3, pay attention to personal hygiene: the usual towels, bed sheets, underwear boiling and cleaning, sterilization, avoid the use of public towels, etc..