Pubic lice are mainly transmitted through sexual contact, but can also be transmitted through indirect contact with bedding, clothing and other items. Pubic lice are ectoparasites that are mainly transmitted through sexual contact, and their eggs are adapted to adhere to pubic hair. It can also be spread through contact with bedding and clothing. Patients with pubic lice or their spouses often have a history of unclean sexual contact, or a history of traveling before the onset of the disease. Pubic lice parasitize the pubic hair, perianal area, etc. If dermoscopy is performed, eggs and larvae can be seen in the pubic hair shaft and roots. It can use mouthparts to bite repeatedly to make the skin bleed, cause disease through mechanical damage and toxic secretion stimulation, cause patients itching and other symptoms. If there is any discomfort, it is recommended to consult a doctor in time for diagnosis and treatment.