Head lice

Head lice is a common condition in schools and nurseries. The lice live on the scalp of the child and the most common symptom is itching.

What is...

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What are head lice?

Lice are tiny, wingless insects that can infest humans.

The most common type is head lice.

Another kind is called crabs, or body lice, which is rarely seen in children. Head lice live on the scalp where they glue their eggs to the hair follicles.

After 1-2 weeks, the eggs hatch and the lice suck blood for nourishment. The presence of the lice on the scalp creates an allergic reaction in the skin, and the scalp gets itchy.

Head lice and their eggs Infection with head lice occurs by direct head-to-head contact, or by sharing hats, caps, clothes, hairbrushes, combs and pillows.

Head lice epidemics are common in schools and particularly affect children between 3 and 12 years old.

Symptoms

Symptoms and signs

When a child has head lice, the most pronounced symptom is itching of the scalp.

The child may also have sores and scratch marks on the scalp from scratching.

In order to see the lice and their eggs (nits), it is often necessary to use a special lice-comb, with closely spaced teeth, and a magnifying glass.

Head lice usually are found around the neck area, behind the ears and on the top or crown of the head.

Head lice are the size of sesame seeds and are a brownish color. The oval-shaped, yellow-white eggs are found low down on the hair shaft, very close to the scalp. Lice and their nits can also fasten themselves to the special lice-comb. 

Complications

Lice are contagious and can easily spread among children in close contact with each other, especially family members and classmates. Lice seldom lead to complications. Some children can get a secondary skin infection on the scalp, with a crusted, oozing rash, as well as swollen lymph nodes on the neck and throat. This is from repeated scratching of the scalp. 

Home treatment

Treatment / What you should do

Contact your doctor if you suspect that your child has lice.

The doctor may recommend that the child be treated with special medicines in the form of cream, shampoo or lotion.

Follow the instructions that come with the treatment. These products are generally considered safe for children when used as directed.

The treatment should be repeated after 7 to 10 days, because the eggs may have survived the first treatment. Others in the family or day care center should be examined actively for the infection. Only people who are truly infected by lice should be treated, and ideally, all infected persons should be treated at the same time to prevent a new outbreak.

Treatment works best when combined with combing and removal of any lice or nits. Use a special closely spaced lice comb.

If you still see live lice shortly after treatment, you may need to use another form of treatment.

Consult with your doctor again if the first treatment does not work. Do not use more than one remedy at a time.

In addition to treating the child's scalp, you must also remove the lice from the child's clothes, hats, scarves, and other headgear.

Lice need to be around people to survive and will starve if the clothes are not worn for a week.

The lice can also be killed if the clothes are washed in hot, soapy water or dried in a dryer set at high heat.

Wash combs and hairbrushes in lice shampoo or hot, soapy water.

Since lice to not live long when away from people, extensive house cleaning generally is not necessary.

Pets cannot get head lice nor spread infection. If the child has developed a secondary bacterial infection in the scalp, antibiotics may be needed.

Prevention

Prevention

Having a case of head lice is not a sign of poor hygiene and does not mean the child's house is unclean. Inform the child's school or day care provider if you have confirmed that your child has lice, so that other children can also be examined and treated if necessary.

Encourage your child not to exchange or borrow head coverings or hair accessories, such as hats, barrettes, towels or helmets from other children, or hairbrushes or combs.

Examine your child's head closely every few days for a while if you have heard that one of your child's playmates has lice.

Avoid allowing your child to lay on bed linens or pillows that have been used by people with head lice.

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Head lice

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