a.k.a pubic lice/head lice are transmitted by contact with an infected person.
Skin irritation and itching are the most common symptoms. Detecting them
is done by visual inspection. Crabs or crab eggs, known as "nits" can be
located on hair shafts. They are usually found in either the scalp or pubic
hair. Occasionally, they will be found in chest or underarm hair.
If you would
like to learn more about crabs, contact these sights: