The body louse, scientifically known as Pediculus humanus corporis, is a small parasitic insect that infests humans. It primarily lives in clothing and feeds on human blood, often causing itching and discomfort. Body lice are typically found in crowded or unhygienic conditions, where personal hygiene may be lacking. Unlike head lice, which infest the scalp, body lice prefer the seams of clothing and can spread diseases such as typhus and trench fever. They are transmitted through close contact with an infested person or by sharing clothing and bedding. Maintaining good hygiene and cleanliness is essential to prevent infestations.