The body louse is a small parasitic insect that infests human clothing and feeds on blood. It is typically found in the seams of clothing and can cause itching and discomfort. Body lice are different from other types of lice, such as head lice and pubic lice, as they primarily live in clothing rather than on the body. Body lice are known to spread diseases, including typhus and trench fever. They thrive in crowded and unhygienic conditions, making them more common in areas with poor sanitation. Effective treatment includes proper hygiene, washing clothes, and using insecticides to eliminate the infestation.