Crab Louse (Pubic Louse)

Exclusively on humans, primarily in coarse body hair such as pubic hair, but can also be found in armpits, facial hair, or eyelashes.

Obligate hematophage; it feeds exclusively on human blood several times a day.

They are relatively sedentary and cling to hair shafts with specialized claw-like legs. They cannot jump or fly and are usually transmitted through close bodily contact or shared personal items like bedding.

Risks include intense itching (pruritus) due to an allergic reaction to their saliva and potential secondary skin infections from scratching. They are not known to transmit diseases.