Also known as: head lice, body lice, pubic lice, lice infestation.
What are lice?
There are three different kinds of lice which live in human hair of the head, pubic area or on the body. They may be few or large in number (infestation), are common in schoolchildren, highly contagious and spread through close contact, shared clothing or shared personal items like combs or brushes.
What causes lice?
Lice infection is caused by a tiny wingless parasitic insect called a louse (lice is the plural of louse).
What are the signs/symptoms of lice?
Lice eggs (nits) look like tiny yellow or brown dots (they look like dandruff) before they hatch and are laid by the lice on the shafts of the hair close to the scalp. After they hatch they leave their white shells firmly attached to the hair shaft. Rarely does one actually see live lice. Lice feed on blood a number of times a day and can only survive off the body for 2 days.
Head lice may cause no symptoms at first but over time scalp itchy and scratching causes the skin to become red and may ooze fluid or become infected. Hair loss may occur.
Pubic lice causes severe itching and lice bites can cause small reddish marks that look like bruises on the body, thighs, and upper arm. Eyelashes may have the tiny white eggs/lice at their bases.
Body lice causes severe itching especially at night and cause sores in the armpits, on waistline and body.
What are lice care options?
Lice/nits can be removed by using a fine-toothed comb every 3-4 days for 3 weeks after the last live louse has been seen. The most common treatment is an over-the-counter or prescription shampoo, lotion or cream. If these are not effective your pediatrician may prescribe other treatments. For the itching a number of medications are available which your pediatrician will discuss with you. Great care is also required to ensure that all clothes, bedding, stuffed animals and other items that have lice are decontaminated to prevent reinfection.
Reviewed by: Sunil U Bochare, M.D.
This page was last updated on: 2/15/2018 9:35:42 AM
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