What is it?
Head lice are tiny bugs about the size of a pinhead that live only on the scalp of human beings. They do not have wings so they cannot fly or jump but do crawl very quickly.
Lice lay eggs on the hair called nits. Live eggs are dark but can also be the colour of the hair they are on. They stick to the hair and do not fall off if you touch them. After the eggs have hatched, the shells are white. These empty shells stay on the hair, as the hair grows.