It is not possible to generalize how long pubic lice can survive away from the body. Its larvae or adult lice die in about 1-3 days after leaving the body, while the eggs usually die in 7-9 days.
Pubic lice are an extracorporeal parasite that is highly contagious and mainly live in the pubic hair area. Pubic lice will feed on human blood, and the toxic secretions in their saliva during the feeding process will irritate the skin and cause itching and other symptoms.
Because pubic lice larvae or adult lice feed on human blood, they need to suck blood more times a day and are more dependent on the human body, so they usually do not survive for a long time after leaving the human body.
Therefore, it is recommended that when symptoms of vulvar itching occur, especially when pubic lice infection is suspected, it is recommended to consult a doctor in time for a clear diagnosis. Meanwhile, as pubic lice are contagious, it is recommended to avoid coitus before the lice are cured to avoid cross-infection.