Dermatology

Parasitic Infections of the Skin

Parasitic Infections of the Skin | Creeping Eruption | Lice | Scabies

Lice

What are lice?

Lice are tiny insects that can infest the skin anywhere on the body. Lice infection is characterized by intense itching.

Lice are highly contagious, spreading from person-to-person by close body contact, shared clothes, and other items (such as hats, hairbrushes, and combs). There are three types of human lice, including the following:

head lice
body lice
pubic lice

Facts about lice

Head lice:

Head lice are less likely to occur in African-Americans.
Head lice are seen mostly in childcare settings and among school-aged children.
The child usually has itching in the head.
Lice, or the eggs (called nits), can usually be seen on the hair, behind the ears, and on the neck.

Body lice:

Body lice are usually seen in people with poor hygiene.
Body lice are rare in children.
Body lice cause severe itching, which is often worse at night.
With body lice, in some cases, lice and eggs can be found in the seams of clothes.

Pubic lice:

Pubic lice are very contagious and can be transmitted through sexual contact, or by contaminated items such as towels and clothes.
Pubic lice can affect the pubic hair, but also can cause infections of the hair on the chest, abdomen, thighs, and eyebrows.
Itching of the affected area is a common symptom of pubic lice.

How are lice diagnosed?

The eggs laid by lice are usually visible to the naked eye, making it easy for your physician to diagnose. Pubic lice leave small, brown spots on the parts of clothing that come into contact with the genitals or anus.

Treatment for lice:
Specific treatment for lice will be determined by your physician based on:

your age, overall health, and medical history
extent of the infestation
your tolerance for specific medications, procedures, or therapies
expectations for the course of the infestation
your opinion or preference

Lice are treatable. Treatment may include:

For head lice and pubic lice:
- Application of a medicated cream rinse or shampoo is usually effective treatment for head and/or pubic lice. Specific instructions need to be followed. Discuss this with your physician. Examples of medicated cream rinses or shampoos include the following:
  - permethrin or Nix® cream rinse
  - lindane
  - Kwell® shampoov
  - pyrethrins or RID® gel
- Nits need to be removed from the hair with a fine-tooth comb.
- Combs and brushes should be soaked in hot water with the shampoo for period of at least 15 minutes.
For body lice:
- Medications are usually not needed to treat body lice.
- Treatment for body lice usually consists of improving hygiene and washing clothes.
- Bed sheets and blankets should be washed in hot water and dried in a hot dryer.

This page was last updated on: February 1, 2008.

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