Phthirius Pubis is commonly known as pubic lice, but there are several synonyms that refer to the same parasitic insects. Crab lice, pubic louse, and crabs are other terms used to describe this species of lice, which is known for infesting the pubic hair of humans. While pubic lice are primarily associated with sexual activity, they can also be transmitted through close contact with contaminated clothing, bedding, or towels. Symptoms may include itching, rashes, and sores on the affected area. Treatment typically involves the use of medicated shampoos or creams, and careful hygiene practices to avoid further infestation.