10 Things to Know About Head Lice

What to Know About Head Lice

They hide from the light. They feed on your blood. No, they're not the villains in the latest vampire flick—they're head lice. These tiny creatures, about the size of a sesame seed, don't cause lasting damage or carry any diseases. Still, most of us would rather skip an itchy, annoying infestation.

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Medically Reviewed By: Williams, Robert, MD

Last Annual Review Date: 2012-06-07

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True or false? Head lice can often be found behind the ears and at the hairline at the back of the scalp.