Human lice are lice that parasitize the human body and are broadly categorized as body lice, head lice and pubic lice. It will cause a series of symptoms such as itching and rash. Patients should pay attention to hygiene and active treatment. 1. Body lice: Commonly known as clothes lice, they are parasitized in human hair follicles and live mainly by sucking blood. Body lice bites can appear red spots, pimples, etc., patients will be accompanied by itching skin. Long-term scratching can appear skin pigmentation, moss-like lesions. 2. Head lice: head lice are small gray insects without wings, usually infected by contact with patients’ combs, heads, hats, hairpins, turbans and other items. It will lead to itching and inflammation of the scalp. 3. Pubic lice: pubic lice are mostly parasitized in the pubic hair area, which can appear as erythema, pimples, itching and other symptoms in the pubic area, and pubic lice activities can be found in the pubic hair area of the patient. Generally can be transmitted through sexual life. Found human lice, patients should pay attention to maintain local hygiene, can remove the diseased parts of the hair. If necessary, they should go to the regular hospital for diagnosis and treatment.