<s>[INST] <<SYS>> This is a medical question of type : information <</SYS>> What is (are) Parasites - Lice - Head Lice ? [/INST] The head louse, or Pediculus humanus capitis, is a parasitic insect that can be found on the head, eyebrows, and eyelashes of people. Head lice feed on human blood several times a day and live close to the human scalp. Head lice are not known to spread disease. </s>