It seems like school and lice go hand in hand, but I believe that parents can do a lot to prevent lice from coming into their homes.
Head lice are tiny insects that lay eggs in the human scalp and live on blood. Your scalp will itch because the lice put their saliva into the scalp, which causes irritations. They can't live for more then 2 days off of people, and they cannot fly or jump.
Lice or Dandruff? If you notice that your child is scratching his or her head more than usual, check for head lice. It may seem hard to tell the difference between dandruff, protein deposit buildup, and head lice, but it really isn't. Dandruff and protein deposits from styling products will come off the hair shaft easily, with the flick of a nail. Lice eggs must be pulled off the stands of hair, almost as if they are glued onto the strands.