Why do lice make your scalp itch?

Discovery Health
Administration

The itching sensation that develops when you have lice is actually an allergic reaction to their saliva.

Continue Learning about Lice

Lice

Lice are parasitic insects that feed on blood and can live in peoples heads and on their bodies, including in the pubic area. Head lice often are a concern for parents of young children. Lice crawl, not hop or fly, and are spread ...

commonly through head-to-head contact. A child with lice will experience itching, difficulty sleeping, and sores on the head. The child also might feel like something is moving in his hair. Prescription and over-the-counter shampoos, plus a special comb with tight teeth, work best to kill lice and remove their eggs, called nits.
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.