The life cycle of lice is about a month.
The lice eggs or nits are attached to the hair close to the scalp and are very hard to remove.
They hatch in 7 to 10 days and reach adulthood in another 6 to 10 days. They then live for
another 20 days laying about 10 eggs a day.

Head lice are difficult to treat and to prevent the infection recurring, vigilance is needed
to ensure that no eggs remain to hatch. Not everyone actually gets an itchy head so if someone in the family
is infected all heads should be checked. Some people find the idea quite horrendous,
when my granddaughter became infected my daughter would shake when she was trying to remove
them. As a primary school teacher I had seen so many infected children I was unmoved.

Unfortunately head lice are becoming immune to chemical treatment and many