How Long Can Head Lice Live Without a Host?

Gilles San Martin/CC-BY 2.0

Adult head lice can live for approximately 24 hours away from a host, according to the Centers for Disease Control. Nymphs, or young head lice, can live for only several hours away from a host. Lice eggs are less dependent on a host, and they can live for up to one week without a host.

ADVERTISEMENT