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1 Head Lice Bites: Itchy, Red Bumps Lice bites appear as little red bumps on the scalp, head, and shoulders, and cause the skin to become inflamed and intensely itchy. 2  If you scratch your lice bites, it may cause them to become infected.
Letâs first get the elephant out of the room: lice do not come from animals. They are transmitted ONLY between humans. The human head louse is an ectoparasite, which means it lives on the surface of his host. It is an insect that lives on the human scalp and feeds on human blood. The entire life of lice is spent on the human scalp. According to research, head lice have been spreading among humans for thousands of years.