Body lice are tiny insects, about the size of a sesame seed. Body lice live in your clothing and bedding and travel to your skin several times a day to feed on blood. The most common sites for bites are around the neck, shoulders, armpits, waist and groin — places where clothing seams are most likely to touch skin.
Body lice are similar to head lice, but have different habits. While head lice live in your hair and feed on your scalp, body lice typically live in your clothes and bedding. They travel to your skin several times a day to feed on blood.
The seams of your clothing are the most common places for body lice to lay their eggs (nits). You can become infested with body lice if you come into close contact with a person who has body lice, or with clothing or bedding that is infested with body lice. They bite skin and feed on blood. There's no report that they can get under the skin.