Head lice live approximately 40 to 50 days and they have
three stages of life.
Eggs: Female louse lay eggs near the hair shaft. A special
‘glue’ holds it in place. The eggs will hatch after about 10 days.
*Nymph: A newborn lice is
called a nymph. Nymphs are so tiny
they are barely visible to the naked eye. This is why we suggest a
magnifying glass when checking for
lice. After 12 days the nymph becomes an adult and can reproduce.
*Adults: Adults live about 28 days and can lay four to ten
eggs a day, starting the life cycle over again.