Head lice are insects, but they can’t fly. Instead, they crawl around in your hair and on your scalp to get nourishment. Lice are spread through close personal contact. The parasites crawl onto your clothing, hairbrushes, hats, towels, and any other personal belongings.
If a friend or family member shares your comb or scarf, the head lice can crawl onto the new host and lay eggs, spreading the infestation.
Female head lice can lay several eggs each day. Household pets and other animals do not spread head lice to humans.