Head Lice Treatment in Australia: A Parent's Nit Action Plan

A note in the school bag, a scratchy scalp, and that sinking feeling — head lice (nits) are one of the most common, and most frustrating, parts of primary school life in Australia. The good news: they are harmless. Head lice do not spread disease, they are not a sign of poor hygiene, and a clear, methodical plan will get on top of them. The bad news: there is a lot of outdated advice floating around, and many of the chemical treatments parents reach for first no longer work as well as they once did because Australian lice have become resistant to them. This guide is your step-by-step action plan — how to confirm you are actually dealing with lice, how to choose a method, why the timing of a second treatment matters so much, which old wives' tales to ignore, and how to stop the whole family bouncing it back and forth.

Step 1: Confirm It's Actually Head Lice

Before you treat anything, make sure lice are really there. An itchy scalp on its own is not proof — itching can lag days or weeks behind an infestation, and plenty of itchy scalps have nothing to do with lice at all. The most reliable way to diagnose head lice at home is detection combing with conditioner.

• radio_button_uncheckedCoat dry or damp hair generously with ordinary white hair conditioner. The conditioner stuns the lice and stops them scurrying, so they are easier to trap and see.
• radio_button_uncheckedDetangle with a normal brush, then comb the hair in sections from the scalp to the tips using a fine-tooth metal nit comb (teeth roughly 0.2–0.3 mm apart).
• radio_button_uncheckedAfter each stroke, wipe the comb on a white paper towel or tissue and look closely — under good light, ideally daylight.
• radio_button_uncheckedLive lice are tan to greyish, about the size of a sesame seed, and move. Eggs (nits) are tiny teardrop-shaped specks glued firmly to the hair shaft, usually close to the scalp.
• radio_button_uncheckedComb the whole head, section by section, until you have been through all of it at least twice.

Step 2: Choose Your Method — The Two Main Approaches

There are two broad camps of head lice treatment available in Australia. Both are recognised as first-line by Australian health authorities. Understanding how each works — and where each falls down — helps you pick what is right for your family.

Camp 1: Physical removal — wet combing and dimeticone products

This camp works mechanically rather than chemically, so resistance is not an issue. The first option is the conditioner-and-comb method (often called "wet combing"): you saturate the hair with conditioner and comb every strand with a fine metal nit comb to physically remove lice and eggs. It is cheap, gentle, and suitable for almost everyone — but it is fiddly and you must do it thoroughly and repeatedly to break the cycle.

The second option is a dimeticone (also spelt dimethicone) product, such as Hedrin or NYDA, which you buy at the pharmacy. These are silicone-based lotions that work physically — they coat the lice and disrupt their ability to manage water, rather than poisoning them. Because the action is physical, lice cannot readily become resistant to them, which is a meaningful advantage over older insecticides. Many parents combine a dimeticone product with conditioner combing for the most thorough result.

Camp 2: Insecticidal products — and the resistance problem

The second camp is the traditional chemical treatments: pyrethrins (from the pyrethrum daisy) and the synthetic pyrethroid permethrin. In Australia you will see these in products such as KP24, Banlice Mousse, and MOOV. They are registered, widely available, and have been used for decades.

The catch is resistance. Australian head lice have been exposed to pyrethrins and permethrin for so long that resistance is now widespread, and these products may no longer reliably kill the lice in many areas. If you use an insecticidal product and still find live, moving lice a day or two later, resistance is the likely explanation — and that is your cue to switch to a physical-removal approach rather than reapplying the same chemical. Insecticidal products also never kill all the eggs, which is exactly why a second treatment is non-negotiable (more on that below).

Head Lice Treatments Compared

Step 3: Repeat on Day 7 — and Why That Timing Matters

This is the step most people get wrong, and it is the single biggest reason head lice keep coming back. No single treatment — physical or chemical — reliably removes or kills every egg. The timing of your second treatment is tied directly to the head lice life cycle.

• radio_button_uncheckedEggs (nits) are laid close to the scalp and hatch roughly 6–9 days later.
• radio_button_uncheckedNewly hatched lice take about another 7–10 days to grow up and start laying their own eggs.
• radio_button_uncheckedYour first treatment removes the lice present that day, but any eggs that survive will keep hatching over the following week.
• radio_button_uncheckedTreating again 7 days later catches those newly hatched lice while they are still too young to have laid new eggs — closing the loop before the cycle can restart.

Can My Child Still Go to School?

Yes. Under current Australian guidance, children do not need to be kept home from school or childcare because of head lice, and they are not excluded until every egg is gone — that would mean weeks off school for a harmless condition. NSW Health, for example, advises that children may return to school after their hair has been treated that morning. Keeping a child home until their head is completely clear of all eggs is not recommended and is not required.

• radio_button_uncheckedStart treatment as soon as you confirm live lice — ideally the evening you find them.
• radio_button_uncheckedYour child can return to school or childcare once the first treatment has been done (for many families, that is the same or next morning).
• radio_button_uncheckedLet the school or centre know if your child has head lice, so other families can check their own children — this is how outbreaks are brought under control.
• radio_button_uncheckedTie long hair back while the infestation is being cleared; it reduces head-to-head contact, which is how lice spread.

Step 4: Ignore These Common Myths

Head lice attract folk remedies like nothing else. Most have little or no good evidence behind them, and some waste the time and effort that would be far better spent combing.

• radio_button_uncheckedTea tree oil and other essential oils: popular as a "natural" fix, but there is no good evidence that tea tree oil reliably gets rid of head lice. Essential oils can also irritate or trigger allergic reactions on children's scalps. If you want a chemical-free route, the conditioner-and-comb method is the better-supported option.
• radio_button_uncheckedDrowning lice in olive oil, mayonnaise or petroleum jelly: the idea of "suffocating" lice overnight is appealing, but the evidence that home suffocation methods work is weak, and slathering on greasy substances is messy and hard to remove. Purpose-made dimeticone products are a more reliable physical option.
• radio_button_uncheckedHair dryers and hot air: blasting the scalp with heat is not an effective or safe way to clear an infestation at home, and there is no reliable evidence it works for everyday use.
• radio_button_uncheckedShaving heads or harsh scrubbing: unnecessary and distressing — lice live on the hair near the scalp and are removed by combing, not by extreme measures.
• radio_button_uncheckedTreating 'just in case' with no live lice: do not apply insecticidal products to a child who does not have a confirmed, active infestation. Treat only when you find a living louse.

Step 5: Stop It Bouncing Around the Family

Head lice spread mainly through direct head-to-head contact, not from furniture, hats or pillows. They cannot fly or jump, and away from a warm scalp they survive only a short time. That means most of your energy should go into checking heads, not deep-cleaning the house.

• radio_button_uncheckedCheck every household member's head on the same day you find lice — using the conditioner-and-comb method — and treat anyone who has live lice.
• radio_button_uncheckedDo not pre-emptively treat family members who are clear; just keep checking them weekly until everyone has been clear for a fortnight.
• radio_button_uncheckedKeep long hair tied back or braided during an outbreak to limit head-to-head contact.
• radio_button_uncheckedRemind children not to share hats, brushes, combs or hair ties while lice are being cleared.
• radio_button_uncheckedWashing pillowcases, hats and recently worn clothing in hot water and drying on hot is a reasonable extra precaution, but it is not the main game — chasing every soft furnishing is unnecessary.
• radio_button_uncheckedAvoid the temptation to declare victory after one treatment. Re-infestation usually means a missed second treatment or an untreated family member, not lice living on the couch.

Frequently Asked Questions

What kills head lice immediately?

No head lice treatment reliably kills every louse instantly, and none kills the eggs dependably. Physical approaches — wet combing with conditioner, or a dimeticone product such as Hedrin or NYDA — act on the lice present that day, while insecticides like permethrin (KP24, MOOV) or pyrethrins (Banlice) may work quickly only where lice are still susceptible, which is increasingly uncommon in Australia due to resistance. Because eggs survive any approach and hatch over the following week, the most important step is not finding an instant kill but repeating the treatment on day 7.

What is the head lice life cycle?

An adult female louse lays eggs (nits) glued to hair shafts close to the scalp. Those eggs hatch about 6–9 days later, and the young lice take roughly another 7–10 days to mature and begin laying their own eggs. An adult louse lives for around a month on the head but only a short time off it. This cycle is the reason a single treatment is rarely enough and why the second treatment is timed for day 7 — to catch newly hatched lice before they can breed.

How can I prevent lice in hair?

There is no product that reliably prevents head lice, and treating a clear head "just in case" is not recommended. The most practical prevention is regular detection combing with conditioner — about once a week during the school term — so you catch any infestation early, plus keeping long hair tied back and discouraging the sharing of hats, combs and hair ties. Checking heads promptly and letting the school know when lice are found does more to limit spread than any spray or shampoo.

How often should I wash bedding after treatment?

Bedding is a minor player, because lice survive only a short time away from the scalp. Washing pillowcases and recently used towels in hot water and drying them on a hot setting around the time of each treatment is a sensible precaution, but daily washing of all bedding is unnecessary. Your effort is far better spent on combing heads and completing the day-7 repeat than on laundering the house.

Can lice live on pillows?

Only briefly. Head lice are adapted to live on the human scalp, feeding regularly and staying warm, and they do not survive long once they fall onto a pillow, hat or lounge. While it is possible for a louse to transfer this way, head-to-head contact is by far the main route of spread. A quick hot wash of pillowcases is reasonable, but you do not need to seal pillows in bags or throw them out.

Does tea tree oil get rid of head lice?

There is no good evidence that tea tree oil reliably gets rid of head lice, despite its popularity as a natural remedy. Essential oils can also irritate the scalp or cause allergic reactions in some children. If you prefer to avoid insecticides, the better-supported chemical-free option is the conditioner-and-fine-comb (wet combing) method, repeated according to the life cycle. Speak to your pharmacist before relying on any essential-oil product, especially for young children.