•  headlice
    The head louse is a tiny, wingless insect that lives among human hairs and feeds on extremely small amounts of blood. Lice (the plural of louse) are a very common problem. Kids are most likely to get lice, but teens can get them too.

    Lice aren't dangerous. They don't spread disease. But they are contagious, so they can spread from person to person easily. They're also annoying: louse bites can itch. If someone scratches a lot, it may lead to skin irritation and even infection.
    A head louse can survive up to 30 days on a person's head and can lay eight eggs a day. Since that means lice can multiply fast, it's a good idea to treat head lice quickly.
    School Information and forms to return to school if your child contracts a case of head lice:
    Treatment Instructions 
    There are lice and other health resources available at: http://kidshealth.org/teen/safety/first_aid/head-lice.html