In a preschool classroom, children are close together throughout
the day during play, circle time, and group activities. Young
children naturally have very little personal space. That close
contact is the main way head lice moves from one child to
another.
Sharing brushes, combs, hats, or hair accessories can
occasionally spread lice, but it is highly unlikely. Most of us
were taught growing up that sharing these items was the primary
cause. In reality, that is not how most cases start.
A lot of people also believe head lice comes from coats, book
bags, cubbies, or the carpet. That is not true. Head lice cannot
live off a person for long.
Head lice feed every three to four hours. When they feed, they
secrete saliva that thins the blood so they can extract it from
the scalp. Once they are off a person for more than about 12
hours, they become too dehydrated to secrete that saliva. Head
lice do not want to be off a human head.
That is why, as a service, we never offer to clean homes. That
would be ripping people off. When you deal with lice, you always
focus on someone, not somewhere.
What has increased head lice in recent years is screen time.
Kids spend far more time hovering over phones, tablets, and
other devices, along with taking pictures, with their heads
close together. That’s a big reason head lice has become more
common.