Bugs in pubic hair can be caused by pubic lice. Pubic lice is a kind of parasitic arthropods in pubic hair, mainly parasitic in the pubic hair around the vulva and anus, after being infected, it will be found in the pubic hair grayish-white sand-like particles and slow-moving pubic lice, and at the same time, the vulva will appear obvious itching symptoms, the skin of the pubic lice bites may also appear scabs, scratches, ecchymosis and so on. Pubic lice are contagious, so after infected with pubic lice, you must go to the hospital in time to prevent transmission to others, avoid sex during the treatment period, sexual partners also need to be examined and treated at the same time, the patient used underwear, bed linen, etc., all need to be high temperature sterilization treatment before they can be used.