You may have pubic lice, commonly known as crabs, if you experience intense itching in the genital area due to lice bites. Other signs include visible tiny crab-like lice crawling on pubic or coarse body hair, seeing nits (lice eggs) attached at the base of hairs, dark or bluish spots from bites, and sometimes general discomfort or irritability. The lice are often visible to the naked eye, especially with a magnifying glass, and can also inhabit other coarse hair such as eyelashes or armpits.