What are head lice?
Head lice are small blood-sucking insects that spread through casual contact between people, usually children.
Author: Jonathan Meddings
First answered: 23 Sep 2014
Last reviewed: 19 May 2018
Rating: 4.7/5 Votes: 259
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Head lice are diagnosed with a scalp examination for the lice or their eggs (nits), which are usually laid and attached to hair within 1.5cm of the scalp. You can also check by applying hair conditioner, which stuns the lice and stops them moving around, then …
A range of treatments can be used to kill lice. Lotions containing permethrin and pyrethrin are commonly used. Oral ivermectin can be used when the lice are resistant to treatment with lotions. A fine-toothed comb can also be used to help remove the lice and …