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    Head & Neck Surgery

    The Brooklyn Hospital Center's Division of Head and Neck Surgery manages the diagnosis and surgical treatment of benign and malignant tumors of the head and neck. Staffed by a team of highly capable sur ...

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    Pediatric Emergency Medicine Physician The Brooklyn Hospital Center 121 DeKalb Avenue Brooklyn NY 11201 Specialty:  Pediatric Emergency Medicine Medical School:  University of Pennsylvania School of Medicine Internship:  Jackson Memorial Hospital Residenc ...

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Head lice

Definition

Head lice are tiny insects that live on the skin covering the top of your head (scalp). Head lice may also be found in eyebrows and eyelashes.

Lice can be spread by close contact with other people.

Alternative Names

Pediculosis capitis - head lice

Causes

Head lice infect hair on the head. Tiny eggs on the hair look like flakes of dandruff. However, instead of flaking off the scalp, they stay put.

Head lice can live up to 30 days on a human. Their eggs can live for more than 2 weeks.

Head lice spread easily, particularly among school children. Head lice are more common in close, overcrowded living conditions.

You can get head lice if you:

Having head lice causes intense itching, but does not lead to serious medical problems. Unlike body lice,head lice never carry or spread diseases.

Having head lice does NOT mean the person has poor hygiene or low social status.


Symptoms

Symptoms of head lice include:

Exams and Tests

Head lice can be hard to see. You need to look closely. Use disposable gloves and look at the person's head under a bright light. Full sun or the brightest lights in your home during daylight hours work well. A magnifying glass can help.

To look for head lice:

Both children and adults should be treated right away if any lice or eggs are found.

Treatment

Lotions and shampoos containing 1% permethrin (Nix) often work well. You can buy these medicines at the store without a prescription. If these products do not work, a doctor can give you a prescription for stronger medicine. Always use the medicines exactly as directed. Using them too often or in the wrong way can cause side effects.

To use the medicine shampoo:

You also need to get rid of the lice eggs (nits) to keep lice from coming back. To get rid of nits:

When treating lice, wash all clothes and bed linens in hot water with detergent. This also helps prevent head lice from spreading to others during the short period when head lice can survive off the human body.

Ask your health care provider if people who share bedding or clothes with the person who has head lice need to be treated as well.

Outlook (Prognosis)

Most of the time, lice are killed with the proper treatment. However, lice can come back if you do not get rid of them at the source.

Possible Complications

Some people will develop a skin infection from scratching. Antihistamines can help ease itching. 

When to Contact a Medical Professional

Call your health care provider if:

Prevention

Never share hair brushes, combs, hair pieces, hats, bedding, towels, or clothing with someone who has head lice.

If your child has lice, be sure to check policies at schools and daycare. Many places do not allow infected children to be at school until the lice have been completely treated.

Some schools may have policies to make sure the environment is clear of lice. Cleaning of carpets and other surfaces often helps prevent spread of all types of infections, including head lice.

References

Morelli JG. Arthropod bites and infestations. In: Kliegman RM, Behrman RE, Jenson HB, Stanton BF, eds. Nelson Textbook of Pediatrics. 19th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 660.

Elston DM. Arthropods and leeches. In: Goldman L, Schafer AI, eds. Cecil Medicine. 24th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 367.

Diaz JH. Lice (pediculosis). In: Mandell GL, Bennett JE, Dolin R, eds. Principles and Practice of Infectious Diseases. 7th ed. Philadelphia, Pa: Elsevier Churchill Livingstone; 2009:chap 293.

Burkhart CN, Burkhart CG, Morrell DS. Infestations. In: Bolognia JL, Jorizzo JL, Schaffer JV, et al, eds. Dermatology. 3rd ed. Philadelphia, Pa: Mosby Elsevier; 2012:chap 84.



Review Date: 2/21/2013
Reviewed By: Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, Bethanne Black, Stephanie Slon, and Nissi Wang
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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    Orthopaedic Services

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