Head lice are wingless insects measuring 2.0 to 3.5 mm, that live in hair only on the human head. They can especially be found behind the ears and in the nape of the neck.¹

They can neither jump nor fly but migrate when direct hair to hair contact occurs, using their six very powerful legs with hook-like claws.

Transmission takes place from human to human, objects such as commonly-shared caps, hair brushes and toys which come into contact with scalp hair² are rarely the cause for transmitting head lice.