Pubic lice are also known as crabs . Pubic lice are related to head lice and body lice. They are usually found around the genitals in pubic hair. Lice look like tiny crabs 1-2 mm in diameter and they are gray or brownish red in color.
Lice live by feeding on human blood which is why they become brownish red.
Scabies is caused by mites that burrow under the skin to lay their eggs. Burrows are usually found between the fingers, around the genitals, on the wrists, buttocks or under the arms. Since lice can live 24-48 hours away from the body, they can be picked up through contact with infested sheets, towels and toilet seats. The first sign of pubic lice is usually itching in the genital area. Pinhead-size blood spots may be seen on the underwear or bluish spots in the pubic area or thighs where lice have bitten.