What Causes Head Lice?
Reviewed: Dr. Gromatzky
1. Nits
In order to know more about what causes head lice, it can help to understand their life cycle better first. This cycle starts with their eggs – which are commonly known as nits. These eggs are laid at the base of strands of hair and are attached quite firmly with a form of adhesive.
These eggs will usually hatch within 9 days of being laid, and the empty egg shells will be left behind. These eggs, hatched or unhatched, are very small but are just about visible to the naked eye. To begin with there is a good chance that they will be mistaken for dandruff or dried hair products.
