What are pubic lice?
Pubic lice, also known as crabs or genital crabs, are very small insects called Phthirus pubis that can infest your genital area. They’re different from head lice, and they got their nickname because they resemble crabs. Pubic lice are about 1/16 inch (1.6 millimeters) or less in size, making them very difficult to see.