Head lice are parasites that can be found on the heads of people. Infection with head lice is called pediculosis.
(The head louse, Pediculus humanus capitis, is different from the lice that cause body and pubic-hair infections.)
GET TO THE HEAD OF LICE
Remedies from Homes
They feed on blood, live within the hairs of human heads, and are an insect of the parasitic variety referred to as head louse, or, more commonly termed, head lice. To expand upon the distinction of these particular parasites, head lice are unique in invading and inhabiting hair [...]