What Does A Pubic Crab Look Like?

A pubic crab is a tiny parasitic insect that lives in coarse human hair, most often in the pubic area. They are called crabs because their bodies resemble miniature crabs when seen up close. These insects are visible to the naked eye, but most people need a bright light and a magnifying glass to see them clearly.

What Does A Pubic Crab Look Like?

A pubic crab is about 1 to 2 millimeters long. That is roughly the size of a pencil tip. They have a round, flat body that is wider than it is long. Their color ranges from grayish-white to tan or reddish-brown, depending on whether they have recently fed.

Their most distinctive feature is their front claws. These claws look like tiny crab pincers. They use them to grip hair shafts tightly. Their six legs are short and thick, with the back pair being noticeably larger and equipped with strong gripping hooks.

Under a microscope, you can see that their bodies are covered in tiny hairs. These hairs help them sense movement. Their heads are small and slightly pointed, with two small antennae. They do not have wings and cannot jump or fly.

How Do Pubic Crabs Compare To Other Lice?

Pubic crabs are one of three types of lice that infect humans. The other two are head lice and body lice. Each type looks different and lives in a different part of the body.

Head lice are longer and more slender than pubic crabs. They are about the same size, but their bodies are oval-shaped rather than round. Body lice look similar to head lice but are slightly larger. Pubic crabs are the only type that have the crab-like shape with the wide body and large back legs.

Pubic crabs also move differently. Head lice crawl quickly across the scalp. Pubic crabs move slowly. They tend to stay in one spot, gripping a hair shaft with their claws and feeding in place.

What Do Pubic Crab Eggs And Nits Look Like?

Pubic crabs lay eggs called nits. These eggs are tiny, oval-shaped capsules. They are about 0.8 millimeters long, which is smaller than a grain of sand. They are attached firmly to the base of a hair shaft, close to the skin.

Freshly laid nits are pale yellow or white. They may look like dandruff at first glance. The key difference is that nits are stuck to the hair and will not flake off when brushed. Dandruff falls away easily, while nits stay firmly attached.

After the eggs hatch, the empty shells remain on the hair. These empty nits appear white and translucent. They move further from the skin as the hair grows. Finding empty nits does not always mean live lice are still present, but it does mean there was an active infestation at some point.

Where Do Pubic Crabs Live On The Body?

Pubic crabs prefer coarse, widely spaced hair. The pubic region is their primary home. They can also live in other areas with similar hair, including armpits, chest hair, beards, mustaches, and eyelashes.

They do not typically live on the scalp. Scalp hair is too fine and grows too densely for them. This is an important distinction from head lice, which are specifically adapted to scalp hair.

Infestations of the eyelashes are possible but less common. This usually happens in children or in adults who have close contact with an infested person’s bedding or towels. Eyelash infestations require different treatment and should be evaluated by a doctor.

How Can You Tell If You Have Pubic Crabs?

Intense itching in the pubic area is the most common symptom. The itching comes from an allergic reaction to the lice saliva. It usually takes about five days after the initial infestation for the itching to begin.

You may also notice visible signs. Tiny rust-colored spots on your underwear can be a clue. These are droppings from the lice. You might also see small blue-gray spots on the skin of your thighs or lower abdomen. These are called maculae caeruleae and are caused by the lice bites.

To check for crabs, use a bright light and a magnifying glass. Look closely at the base of the pubic hairs. You are looking for the tiny crab-shaped insects themselves or the small oval nits attached to the hair shafts. A fine-toothed comb can help separate hairs for a clearer view.

How Are Pubic Crabs Spread?

Pubic crabs are almost always spread through sexual contact. This is why they are classified as a sexually transmitted infection. The crabs crawl from one person’s pubic hair to another’s during close physical contact.

Less commonly, they can spread through shared items. Towels, bedding, or clothing that has been in contact with an infested person can carry the lice. However, pubic crabs cannot survive away from a human host for more than 24 to 48 hours. They need human blood to survive and will die quickly without it.

You cannot get pubic crabs from toilet seats. The lice cannot survive on smooth, cold surfaces long enough to transfer to a new host. This is a common myth with no evidence to support it.

How Are Pubic Crabs Treated?

Treatment for pubic crabs involves applying a medicated lotion or cream to the affected areas. These products contain ingredients that kill the lice. They are available over the counter and by prescription.

Permethrin 1% lotion is the most common over-the-counter treatment. It is applied to the affected areas and washed off after ten minutes. A second application is usually recommended seven to ten days later to kill any newly hatched lice.

Prescription options are available for cases that do not respond to over-the-counter treatment. These include stronger topical medications and, in some cases, oral medication. A doctor should guide the choice of treatment, especially for pregnant women or people with extensive infestations.

All recently used clothing, towels, and bedding should be washed in hot water and dried on high heat. Items that cannot be washed should be dry-cleaned or sealed in a plastic bag for 72 hours. Sexual partners from the past month should also be treated, even if they have no symptoms.

Can Pubic Crabs Be Prevented?

Prevention is straightforward. Avoid sexual contact with anyone who has an active infestation. Using condoms does not prevent pubic crabs because the lice live in the pubic hair outside the area a condom covers.

Do not share towels, bedding, or clothing with others. This is especially important in situations where you cannot be certain of someone’s hygiene status. Pubic crabs do not indicate poor hygiene. Anyone who has close physical contact with an infested person can get them.

If you have been diagnosed with pubic crabs, inform your sexual partners so they can be checked and treated. Treating everyone at the same time prevents reinfestation. It is also important to complete the full treatment course, even if symptoms improve quickly.

When Should You See A Doctor?

You should see a doctor if over-the-counter treatment does not work after two applications. You should also see a doctor if you are pregnant, nursing, or treating a child. Some treatments are not safe for these groups.

See a doctor if the itching becomes severe or if you notice signs of a secondary skin infection. Scratching can break the skin and allow bacteria to enter. Redness, swelling, warmth, or pus are signs that an infection may be developing.

Eyelash infestations always require medical attention. Do not use standard lice treatments near the eyes. A doctor can safely remove the lice and nits from the eyelashes using specialized tools and techniques.