Need to talk? Call 1800 882 436.
It's a free call with a maternal child health nurse. *call charges may apply from your mobile

Is it an emergency? Dial 000
If you need urgent medical help, call triple zero immediately.

beginning of content

Head lice

7-minute read

Key facts

  • Head lice are tiny, wingless insects about the size of a sesame seed, that live in hair.
  • Head lice and nits are a common problem in primary school aged children, but can affect people of any age.
  • Head lice move between children (or adults) by head-to-head contact during play and can survive for some hours on combs and brushes.
  • There are safe and effective ways to treat head lice at home.
  • The best way to check your child's hair for lice is to follow a weekly routine of scalp and hair examination.

What are head lice?

Head lice are tiny, wingless insects about the size of a sesame seed that live in the hair of humans. They feed on blood by biting the skin. Their eggs are called nits and are laid in the hair. The nits hatch after several days, producing more lice.

Lice and nits are not dangerous, and do not spread disease, but the bites can cause itching, can be uncomfortable, and sometimes can cause skin irritation.

Should I keep my child home from school?

There is no requirement to keep children home from school or child care as long as effective treatment begins before the next day of school or child care.

How are head lice spread?

Head lice can be passed between people (most often children) by contact with personal items, for example shared combs and brushes.

The spread of lice among preschool and school children is common, and is not a sign of poor hygiene.

Lice need warmth and blood to survive. They do not live for long on furniture, hats, bedding, carpet or anywhere else in the environment.

What are the symptoms of head lice?

Lice can often cause the skin to become itchy, but this is not always the case. Bites can cause symptoms such as redness and irritation, which can be made worse by scratching.

You can see the lice and nits if you look closely at the head and scalp. Nits look like tiny white dots attached firmly to the hair. They cannot be brushed or flicked off the hair, but must be physically removed with fingers, fingernails or special nit combs.

How do I know if my child has head lice?

Your child will not always have an itchy scalp if they have head lice. Similarly, an itchy scalp does not always mean that your child has head lice.

The best way to check your child's hair for lice is to follow a weekly routine of scalp and hair examination. Use the following guide for a thorough check:

  1. Using a normal comb, spread hair conditioner through your child’s dry, untangled hair. The hair conditioner briefly stuns the lice to make them easier to catch (lice usually move very quickly, so you might not see them without this step). Thick white conditioner makes it easier to see dark lice and eggs.
  2. Using a special metal fine-toothed nit comb (available from a supermarket or pharmacy), comb sections of hair from the roots to the tips, making sure you comb the entire head. Nits and lice become trapped by the fine teeth of the comb.
  3. Wipe the conditioner (and lice and nits) from the comb onto a paper towel or tissue.
  4. Examine the tissue and the comb for any sign of lice and nits.
  5. Repeat the combing process twice over on each part of the head.
  6. If lice or eggs are found, you will need to use treatment to get rid of the head lice.

What is the best treatment for head lice?

The most effective treatment involves repeating the hair conditioner and combing process every day until no head lice have been found for at least 10 days. This covers the time it can take for any undetected nits to hatch into more head lice.

You might need to use your fingernails to remove any nits from your or your child’s hair that escaped the comb and that are 15 mm or less from the scalp. Because nits need warmth to stay alive, any that are further away will not hatch — they will be dead or will have already hatched.

The advantages of the hair conditioner and combing process are that it is not expensive and avoids the use of strong chemical pesticides on your or your child’s skin.

How effective is a chemical treatment of head lice?

There are chemicals you can buy at the chemist that kill head lice that are safe for children over 6 months of age. However, there is no single chemical treatment that will work for everyone, as lice can develop resistance to the chemicals.

If you decide to use a chemical treatment, it is important that you closely follow the instructions that come in the package. You will need to repeat the chemical treatment within 7 to 10 days, as most treatments do not kill the eggs. The only way to test whether the treatment has worked is to use a nit comb and look for any live lice. If it has not worked, do not use the same chemical again. Instead switch to another chemical treatment or use the comb and conditioner method.

What can be done to help prevent lice?

It is difficult to prevent head lice. Lice move between children (or adults) by head-to-head contact during play and can survive for some hours on combs and brushes. One step to minimise the spread of head lice is to avoid sharing brushes and combs.

There is no evidence that chemical or herbal products can keep head lice away. Some people think that having clean hair can prevent head lice, but the truth is that head lice are attracted to hair, whether it’s long or short, clean or not.

Resources and support

Learn more here about the development and quality assurance of healthdirect content.

Last reviewed: May 2023


Back To Top

Need more information?

Head lice

Head lice are tiny insect parasites that live on your head and feed on your scalp (the skin covering your head).

Read more on WA Health website

Treatment - Head lice

There are two main treatment options to remove head lice: mechanical removal and chemical removal. Head lice are only found on the human head or hair. Treating anything other than the human head does not eradicate head lice.

Read more on NSW Health website

Head lice and nits in children | Raising Children Network

Kids often get head lice (also called nits), especially at child care, preschool and school. This guide explains head lice treatment, causes and symptoms.

Read more on raisingchildren.net.au website

Head lice | Health and wellbeing | Queensland Government

Head lice are small, wingless, egg laying insects found on the human head.

Read more on Queensland Health website

Head lice (nits) - Better Health Channel

No product can prevent head lice, but regular checks can help prevent the spread.

Read more on Better Health Channel website

Head lice - including symptoms treatment and prevention | SA Health

Head lice are small wingless biting insects which live and breed in human hair and feed by sucking blood from the scalp

Read more on SA Health website

Surgery - How do I prepare my child for planned surgery | Sydney Children's Hospitals Network

Pre surgery wash  Your child needs to be bathed either the night before or on the day of surgery, to reduce the chance of infection

Read more on Sydney Children's Hospitals Network website

Body lice - Better Health Channel

Body lice can spread from one person to another when the environmental conditions are crowded and unhygienic.

Read more on Better Health Channel website

Childhood infections: minimising the spread - MyDr.com.au

The 3 most effective ways of stopping the spread of childhood infections are: getting your children vaccinated; keeping them at home when they are sick; and careful hand washing.

Read more on myDr website

Infectious diseases: when can my child go back to school or child care? - MyDr.com.au

Children with certain infections need to stay away from school or child care to recover and to help stop the spread of infection. Use this guide to work out how long your child should stay away.

Read more on myDr website

Call us and speak to a Maternal Child Health Nurse for personal advice and guidance.

Need further advice or guidance from our maternal child health nurses?

Healthdirect Australia acknowledges the Traditional Owners of Country throughout Australia and their continuing connection to land, sea and community. We pay our respects to the Traditional Owners and to Elders both past and present.

This information is for your general information and use only and is not intended to be used as medical advice and should not be used to diagnose, treat, cure or prevent any medical condition, nor should it be used for therapeutic purposes.

The information is not a substitute for independent professional advice and should not be used as an alternative to professional health care. If you have a particular medical problem, please consult a healthcare professional.

Except as permitted under the Copyright Act 1968, this publication or any part of it may not be reproduced, altered, adapted, stored and/or distributed in any form or by any means without the prior written permission of Healthdirect Australia.