Hello! An adult louse live up to 30-40 days on the human head. During this time the female can lay up to 90
eggs known as nits, which incubate for 7-10 days and then hatch. After 10 days hatched lice matures into adult
and the cycle is repeated. A louse can live off human head for 1-2 days. Nits can live longer but they usually
do not get separated as the female lice glues the nits to the hairs.