Pediculus humanus capitis, often known as head lice or head louse, is a humans obligate ectoparasite. Head lice are wingless insects spending their entire life time on the human scalp and eating only on human blood. People are the only recognised hosts of this specific parasite, whereas chimpanzees host a closely similar varieties, Pediculus schaeffi. Additional variants of lice infest most orders of mammals and also all orders of feathered creatures. Where the lice come from and how to effectively eradicate them with natural home remedies?