Life Cycle of the Head Louse
There are three life stages for lice: the egg (also called a nit), the nymph, and the adult.
Egg/Nit
Nits are very small, about the size of a knot in threat. Nits are laid by the adult female at the base of the hair shaft nearest the scalp. They are firmly attached to their hair shart. They are oval and usually yellow to white. Nits take about 1 week to hatch.
Nymph
The nit hatches into a baby louse called a nymph. Nymphs mature into adults about 7 days after hatching.
Adult
