Crabs is the colloquial name given to pubic lice, small parasites that live on the skin and hair surrounding the genitals and feed on blood. Crabs are easily transmitted via sexual contact. Crabs are not dangerous and usually easy to get rid of with over the counter treatment. The primary symptom of crabs is intense itching. Crabs are visible to the naked eye and most often found at the base of the hair.
More About Crabs
Crabs are referred to as such because of their resemblance to the crustaceans of the same name, though on a much smaller scale.
Crabs are incredibly common with roughly 3 million people affected yearly in the U.S. alone. One reason for this is the ease with which they are transmitted. While they are not transmitted via casual contact like hugs or handshakes, they can easily pass from person to person via sexual contact. It is also possible for crabs to live in any coarse hair on the body including body hair, facial hair, eyelashes, and eyebrows.