A head check is an easy way to discover if your family has head lice.  Many people do not itch even with an active case of head lice.

A female louse only has to mate one time at the onset of adulthood to begin laying eggs…about 175 eggs (conservatively) in her  lifespan. After a female reaches adulthood she will live about 17-20 more days:  From birth to death 30-35 days.