Key takeaway: For head lice parents, the practical first step is to check the child’s scalp carefully for lice or nits. If you are unsure what you found or which product is suitable, ask a pharmacist or qualified health professional before treating.
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What head lice look like
Check close to the scalp, especially behind the ears and at the back of the neck. Head lice are tiny insects that live on people’s heads and feed on blood. Adult lice are about the size of a sesame seed.
- Look for lice and nits: Nits are the eggs of head lice. They are smaller than adult lice and are found on or near the scalp.
- Use good light: Part the hair in small sections so you can inspect the scalp and hair roots.
- Check more than one place: Look behind both ears and along the neckline.
Use a fine-toothed comb to help with checking. For further identification guidance, see the National Library of Medicine’s head lice information.
What to do when you find lice
Confirm what you have found before using a lice medicine. A careful check for live lice and nits helps you decide whether treatment is needed.
- If you find live lice: Choose a treatment that is appropriate for the person’s age and follow the product directions.
- If you find only material in the hair: Check again carefully. Ask a pharmacist or qualified health professional if you cannot tell whether it is a nit or something else.
- If treatment does not seem to work: Do not add or combine products without advice. Ask a qualified health professional about the next step.
The National Library of Medicine explains that head lice can be treated with medicine and by combing out lice and nits.
How to use lice treatment safely
Use one treatment exactly as its label directs. Lice treatments differ, so check the stated age range, application method and any repeat-treatment instructions before you begin.
- Read the label first. Follow the directions for the product you have chosen.
- Check close contacts. Examine people who have had close contact with the affected person.
- Comb the hair. A fine-toothed comb can help remove lice and nits.
- Ask before treating when you are unsure. A pharmacist or qualified health professional can help with product choice, especially for a young child or a person with a health concern.
- Do not combine treatments. Use products only as directed rather than adding extra medicine.
Find general treatment information in the National Library of Medicine’s head lice guidance.
Home remedies and practices to avoid
Use a product intended for treating head lice on people, and follow its label. Do not use household chemicals, insect sprays or pet products on a child’s hair or scalp.
- Do not use fumigant sprays or fogs in the home. Focus instead on the child’s hair, appropriate treatment and limited cleaning of recently used items.
- Do not mix lice products. More product or several products together is not a substitute for following directions.
- Ask for advice before trying an unfamiliar remedy. A pharmacist or qualified health professional can help you choose a suitable option.
For general information on recognised approaches to head lice, consult the National Library of Medicine.
How much cleaning is actually needed?
Clean items that had close contact with the affected person’s hair in the two days before treatment. You do not need to use insecticide sprays around the home.
- Wash clothing, bedding, towels and similar items in hot water, then dry them using a hot cycle if the material allows.
- For items that cannot be washed, seal them in a plastic bag for two weeks.
- Soak combs and brushes in hot water for 5 to 10 minutes.
- Vacuum floors, furniture and other places where the person sat or lay.
These practical cleaning steps are included in the National Library of Medicine’s head lice guidance.
Preventing spread without stigma
Head lice usually spread through direct hair-to-hair contact. Less commonly, they may spread through shared items that recently touched the hair. Teach children not to share combs, brushes, hair accessories, hats, helmets, scarves, towels, or pillows. Routine pesticide use and repeated “preventive” medication are not recommended.
Tell the school, childcare setting, and recent close contacts discreetly so families can check for live lice. Children should not be shamed or isolated. The CDC says students diagnosed at school do not need to be sent home early; they can begin appropriate treatment and return afterward. “No-nit” exclusion policies are discouraged because nits can remain after successful treatment and are unlikely to transfer. See the CDC’s guidance for schools and families.
When to contact a healthcare professional
Ask a qualified health professional or pharmacist for help when you cannot identify what is in the hair or need help choosing a treatment.
- you are unsure whether you have found lice or nits;
- the child is young and the product directions do not clearly cover their age;
- you have questions about using a product safely; or
- you have followed product directions and still need advice about what to do next.
For an urgent health concern or a suspected poisoning, contact your local emergency or poison-information service.
Frequently asked questions
Can pets carry head lice?
No. Human head lice live on people; household pets do not spread them.
Does itching mean treatment failed?
Not necessarily. Itching can continue after lice are gone, and treatments can irritate the scalp. Recheck for live crawling lice instead of judging success from itching alone.
Should every family member be treated?
Check everyone in the household. Treat every person with an active infestation and anyone who shares a bed with an infested person at the same time, following the product label and age restrictions. Other household members who have neither active lice nor bed-sharing exposure usually do not need lice medicine. See the CDC’s head-lice treatment guidance.
Can a child return to school?
Usually after appropriate treatment has begun. The CDC and American Academy of Pediatrics discourage excluding children solely because nits remain. Follow the school’s practical return procedure while advocating for evidence-based, non-stigmatizing policy.
Sources and editorial note
- National Library of Medicine. Head Lice.
This article provides general education and cannot diagnose head lice or select a treatment for an individual child. Speak with a qualified health professional or pharmacist about concerns relating to a specific child.
Explore more practical guidance in Health & Nutrition.
