As school starts back up, so does the number of head lice cases. But humans have been dealing with the parasites for millennia—and that may continue indefinitely. Head lice are some of our oldest ...

The human-head louse has a ghostly quality. It tends to glimmer in and out of view, leaving only subtle signs and omens of its presence. Is that oblong speck an egg sac or a flake of dandruff? Was ...

Lice and fleas are tiny insects that live on your body and feed on blood. But there are key differences between them. Lice are tiny insects that live and grow on human hair, feeding on your blood.

Head lice do not have preferences for clean or dirty hair. Anyone can get lice if they come into close contact with someone who has them. However, some research suggests that certain groups may be ...

The jumpy parasites have followed our ancestors around for at least 25 million years, adapting along with us through major upheavals. By Carl Zimmer Along our evolutionary journey from monkey-like ...

Fleas and lice are different parasitic insects that can cause an itchy reaction on the skin. Though similar, they possess unique traits. For example, fleas can jump, but lice can only crawl. Fleas are ...

Lice can be treated using specialized combs, medicated shampoos, or home remedies like oils. But there’s no single treatment that can get rid of lice right away. Lice are tiny parasites that live in ...