Crabs usually live in the pubic hair, but can sometimes be found in axillary or armpit hair, facial hair, or even eyelashes.
Pubic lice occurs when adult lice lay eggs, called nits, on the hair shaft close to the skin.
The egg, which is white and shiny, requires 7 to 10 days to hatch. A typical infestation is by less than a dozen lice. It is possible to be infested with pubic lice and have no symptoms. More commonly itching occurs, which worsens at night. Pubic lice are difficult to see because of their location and appearance.