Doctor's Notes on Crabs (Pubic Lice)
Pubic lice are parasitic insects found on the genital area hair (pubic hair) of humans. The lice infestation is typically spread by sexual contact, but any skin contact can spread the condition. The lice may occasionally also be found on other areas of body hair. Public lice infestation occurs worldwide. Pubic lice have six legs including two front legs that are very large and look like the pincher claws of a crab. This is the origin of the nickname "crabs."
Signs and symptoms associated with public lice infestation include intense itching in the genital area. Small lice eggs, known as nits, may be seen attached to the hair shaft. Crawling lice may also occasionally be seen.
What Is the Treatment for Pubic Lice?
Lice-killing products may be used to treat pubic lice. Examples include:
- Permethrin, a prescription lotion
- Lindane, which is a prescription shampoo
- Malathion, a prescription lotion
- Ivermectin, an oral medication available by prescription that has been effective in treating pubic lice as well as other parasitic infestations.
Clothing and bedding used by the affected person should also be washed and dried using high heat.
STD : Symptoms, Testing & List Quiz

Condoms are the best protection from sexually transmitted diseases (STDs).
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How Do You Get Lice?
Lice are parasites that feed on human blood and can be found on people’s bodies. You contract a lice infestation by contact with an infested person, their clothes, hair brushes or other close personal items. -
Lice (Head Lice, Body Lice, Pubic Lice)
Lice infestation (pediculosis) is common. Itch is the main symptom of a lice infestation. Lice treatment involves using anti-lice agents, removing nits with a fine-tooth comb, washing and drying all clothes and linens on the hot cycle, and vacuuming floors and furniture. -
Sexually Transmitted Diseases (STDs)
Sexually transmitted diseases (STDs) are among the most common infectious diseases in the United States. STDs can be spread through any type of sexual activity involving the sex organs, the anus or mouth, or through contact with blood during sexual activity. Examples of STDs include, chancroid, chlamydia, gonorrhea, granuloma inguinale, lymphogranuloma venereum, syphilis, genital herpes, genital warts, hepatitis B, trichomoniasis, pubic lice (crabs), and scabies.Treatment is generally with antibiotics; however, some STDs that go untreated can lead to death.
REFERENCE:
Kasper, D.L., et al., eds. Harrison's Principles of Internal Medicine, 19th Ed. United States: McGraw-Hill Education, 2015.