Threadworms: The Itch That Keeps Kids Awake
Threadworms are tiny white worms that live in the bowel and lay eggs around the bottom at night, causing an intense itch. They are the most common worm infection in Australian children, spread easily between family members, and are simple to treat with worming treatments available from a pharmacy.
Threadworms, sometimes called pinworms, have nothing to do with how clean your child, your home or your parenting is. They spread wherever young children gather, and most Australian families will meet them at some point. Catching them is closer to a rite of passage than a hygiene failure.
The worms themselves are harmless in almost all cases. The real problem is the itch, which peaks at night when the female worms lay their eggs, and the broken sleep that follows for children and parents alike. The good news is that with the right treatment and a fortnight of simple habits, the whole episode is usually over quickly.
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The classic sign of threadworms is an itchy bottom, worst at night and in the early morning. You may notice your child scratching in their sleep, tossing and turning, or waking up irritable and tired. Some children describe a tickling or crawling feeling around the bottom, and girls can also have itching around the vulva. The itch tends to come in waves rather than being constant, and it often returns a few weeks after treatment if reinfection occurs.
Sometimes you can see the evidence. Threadworms look like short pieces of fine white cotton thread, about a centimetre long, and may be visible on the skin around the bottom at night or in the poo. Checking gently with a torch an hour or two after your child falls asleep is the time-honoured method. Bear in mind that plenty of children carry threadworms with no symptoms at all, which is one reason the whole household is treated together.
Itch in other places usually points elsewhere. If your child has dry, itchy, inflamed patches on the arms, legs or face, that pattern is more typical of eczema in children than worms.
Threadworms survive by keeping a simple loop running. The adult worms live in the bowel, and at night the females crawl out to lay thousands of microscopic eggs on the skin around the bottom, along with a substance that makes the skin itch. The child scratches, the eggs lodge under the fingernails, and from there they travel to the mouth, are swallowed, and hatch in the bowel to begin the cycle again.
The eggs also spread beyond the child. They can survive for up to two weeks on bedding, towels, pyjamas, toys and bathroom surfaces, which is how threadworms move quietly through a household or a classroom. Like molluscum contagiosum and other conditions that pass easily between children, threadworms spread through everyday contact and shared spaces, not through poor hygiene.
Understanding the cycle is the key to beating it. Treatment kills the worms, but only breaking the cycle stops them coming straight back, which is why the treatment step and the habits step below belong together.
Treatment is straightforward. Worming treatments available from a pharmacy kill the adult worms with a single dose, and a second dose two weeks later catches any worms that have hatched from swallowed eggs in the meantime. That repeat dose is not an optional extra: it is the step that stops the itch returning, and both doses matter even if the itch disappears after the first.
Treat every member of the household on the same day, including adults and children who have no symptoms, because threadworms often spread silently and an untreated family member can quietly reinfect a treated child. There are important exceptions. Children under two, and anyone who is pregnant or breastfeeding, should speak to a doctor before taking a worming treatment, because pharmacy products carry age and pregnancy limits.
If you are unsure what is suitable for your family, a GP can talk you through the options, and our help centre explains what Abby doctors can and cannot prescribe online.
Alongside treatment, a fortnight of simple cycle-breaking habits makes reinfection far less likely:
- Shower your child each morning, because most eggs are laid overnight and a morning wash removes them.
- Keep fingernails short and scrubbed, and gently discourage nail biting and thumb sucking while you clear the infection.
- Change underwear daily, and wash bedding, towels and pyjamas in hot water.
- Get the whole family washing hands before meals and after using the toilet.
- Vacuum bedrooms and damp dust during the treatment fortnight to pick up stray eggs.
There is no need to keep your child away from school or daycare. Once treatment has started, children can attend as normal, and threadworms do not appear on the standard exclusion lists. Rules vary between states and territories, so check your state's guidance if your school or centre asks. It is worth mentioning it quietly to the school if several children seem affected, since treating classmates around the same time reduces the ping pong of reinfection. And one more reassurance: there is no need to treat pets. Threadworms live only in humans, so the family dog is innocent.
See the same doctor each time
Most threadworm infections settle with pharmacy treatment and the habits above, but some situations deserve a doctor's input. See a GP if the itch persists after both doses, because something else may be causing it. Skin that is scratched night after night can break and become infected, so have a doctor look if the skin around the bottom becomes red, weeping or crusted, which can resemble impetigo, or school sores.
A doctor should also advise before any worming treatment is given to a child under two. And book a consult if your child has ongoing tummy pain, is losing weight, seems generally unwell or has a fever that concerns you. Threadworms rarely cause these problems, so persistent or unusual symptoms usually mean something else is going on and deserve a proper look. Our guide to when a child's fever is worth worrying about can help you judge the fever side. It is also reasonable to see a doctor simply for reassurance if worms keep returning despite doing everything right, since a GP can review your routine and check for less common causes.
Abby Health is an online-first clinic, so you can talk to an Australian GP about your child's itching from home, seven days a week, with no waiting room and no awkward conversation required. A doctor can confirm threadworms are the likely cause, advise on treating the whole household, including little ones under two and anyone pregnant or breastfeeding, and check the skin if scratching has caused damage. Our overview of children's health and telehealth explains how video consults work for families.
You can choose to see the same doctor each time, so your family's history is understood. If a rough, itchy night means your child needs a day at home, we can help with a carer's medical certificate for your workplace. Book through our everyday family clinic when it suits you. Bulk billed for eligible patients with a valid Medicare card. Strict eligibility criteria apply. This is general information only and not a substitute for personal medical advice. If your child is ever seriously unwell, unusually drowsy or struggling to breathe, call 000.
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