That makes the scalp a particularly rich environment for microbes ... but occasionally adults get it too. Despite the name, no worm is involved: The condition got its name from its circular shape. The ...

Head lice are tiny, wingless parasites that live on human hair and feed on blood from the scalp. They can be frustrating, causing itching and discomfort. While over-the-counter treatments are ...

Head lice are small parasites that live on human scalps, feeding on blood. While they don’t cause serious health problems, head lice are a common and frustrating problem, especially among ...