Pubic Lice (Crabs)

What are the symptoms of pubic lice?

Pubic lice symptoms often show up about five days after infestation. Symptoms include:

• Pruritus (severe itching) in hairy areas, especially pubic hair.
• Irritated skin that may be bloody or red from lice bites.
• Specks of black lice droppings in your underwear.
• Small white dots on pubic hair that are hard to remove (these are lice eggs).
• Pale bluish spots on your thighs, buttocks and lower abdomen.
• Low fever and feeling run-down.

Why do pubic lice itch?

The lice feed on your blood. They make small bites on your skin. An allergic reaction to the bites causes the itchiness.

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How do pubic lice spread?

You get genital crabs by coming into close physical contact with a person who has them. The lice crawl from the pubic hair of one person to another. The most common way people catch crabs is by having sex with a person who has them. However, any type of close body contact is enough to spread crabs, even if there’s no penetration or intercourse.

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You can occasionally get crabs other ways, too. You can catch them by sharing or having contact with the clothes, linens and towels of a person who has them. But you won’t get crabs through casual contact, such as handshakes or hugs.

What do pubic lice look like?

Pubic lice are very small. You may be able to see crabs by looking closely at your pubic hair. Adult pubic lice resemble crabs you’d see near the ocean (that’s how they get their name). You may even see them move.

The lice look different depending on their stage of growth:

• Nits: These lice eggs are hard to see. They’re usually oval and yellow, white or pearly. Nits attach to the root of your hair (where your hair comes out of your skin). Pubic lice nits take about six to 10 days to hatch.
• Nymph: This is the young louse (singular of lice) that hatches from the egg. Each one needs about two to three weeks to become a mature adult.
• Adult: A fully grown louse has six legs. The front legs are larger and resemble a crab’s pincher claws. Adults are tan or grayish-white. They are about 1.1 to 1.6 millimeters long — about the size of the tip of a pencil. Nymphs and adult lice feed off of your blood to survive. They die within 72 hours once it falls off a person.

Can I get pubic lice from a pet?

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No. Dogs, cats and other pets don’t spread pubic lice.

Are pubic lice the same as head lice?

No. The lice you can get on your head and body are a different type of lice than pubic lice. Pubic lice don’t usually attach themselves to the hair on your head.

Can children get pubic lice?

Yes. Children might get pubic lice if they sleep in the same bed or use the same towels as someone who has pubic lice. It’s more likely to infest their eyelashes or eyebrows. Pubic lice in children may be a sign of sexual abuse.

Can I get crabs by sharing a toilet seat with a person who has crabs?

You most likely won’t get crabs by sharing a toilet seat with someone who has them. The lice can’t live very long when they’re away from a human body. And their legs can’t hold onto a smooth surface like a toilet seat.

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