When the Worry Makes the Rules

It is twenty past nine and the nine-year-old has been in bed for forty minutes. “Did you lock the back door?” Yes. “Are you sure?” Yes, darling. “Can you check?” Her father goes downstairs, checks, comes back up and says it is locked. “Did you check properly? Did you push the handle?” He goes down again. When he comes back she asks him to say it the way he always says it, and he hears himself recite, for what must be the hundredth night, the door is locked, the windows are shut, everyone is safe, nothing bad will happen, in exactly that order, because if the order changes they have to start again.

On the landing afterwards he does the arithmetic. The bedtime that used to take ten minutes now takes fifty. Her hands, in the photograph from half-term, are red at the knuckles. Her homework comes home rubbed thin in places where she has rewritten a letter until it looked right. None of it, on its own, seemed worth a fuss. Put together, on the landing, it looks like something with rules, and he realises that the whole family has been keeping them.

In our work, families usually arrive at this point later than they would have liked, and through no carelessness of their own: OCD grows slowly, and each ritual makes sense at the time.

What is actually happening

Obsessive-compulsive disorder has two parts. The obsessions are unwanted thoughts, images, urges or feelings that arrive uninvited and cause real distress: that someone will be harmed, that her hands are contaminated, that something is not right and must be put right, that she has done or thought something terrible. The compulsions are what she does to make the distress go away, or to stop the feared thing from happening: washing, checking, asking, repeating, arranging, counting, confessing. Some compulsions can be seen. Others happen entirely in her head: a phrase repeated silently, a bad thought cancelled with a good one, a conversation replayed to make sure nothing wrong was said.

The compulsion works, and that is the trap. It brings relief, for a few minutes or a few hours. Then the doubt returns, often louder, and the compulsion has to be done again, or done more carefully, or for longer. Over time her brain learns two lessons, both mistaken: that the doubt was dangerous, and that only the ritual kept everyone safe.

OCD is not a personality trait, a love of order, or being a bit particular, and many children who have it are not tidy at all. It is a recognised condition, and not a rare one. In England’s 2017 survey, about one in two hundred and fifty children and young people aged five to nineteen had it, and studies elsewhere have found it in up to four in every hundred young people. It often begins in childhood or the teenage years, with one peak at around eleven and another in early adulthood, and boys are more likely than girls to start young. In an earlier national survey of British children, only three of the twenty-five children found to have OCD had been seen by specialist services. It tends to hide.

### Ordinary rituals, and the other kind

Small children love rituals. The same story in the same order, the cup that has to be the blue one, the goodnight said exactly so: this kind of thing is at its height between about two and four, fades on its own, and is part of how young children make the world predictable. Plenty of older children have habits and superstitions too.

What marks out OCD is fear, time and cost. The ritual is driven by dread, or by a powerful sense that something is wrong, rather than by preference. It takes up real time; an hour or more a day is the rough marker specialists often use. It causes distress, to her and often to everyone around her. And it gets in the way of sleep, of school, of friendships and of the family’s ordinary life. A child who likes her pencils in a row is different from a child who cannot start her homework until they are in a row, and is in tears because the row will not come right.

### What it can look like in children

Some forms are easy to recognise: washing that goes on too long; checking doors, switches and plugs; needing things even or symmetrical; redoing things until they feel right; touching or tapping in a pattern; counting. Others are easily missed.

Reassurance seeking is one of the most common, and parents often do not recognise it as part of OCD. The same question, again and again: Are you sure? Did you check? Do you promise? Was it my fault? Each answer helps for a moment and then stops helping.

Slowness is another. A child whose mornings take forever, who cannot get out of the bathroom, who reads the same paragraph four times, may be carrying out rituals no one can see.

Avoidance can make OCD invisible: the child who will not use the school toilets, will not touch a door handle, will not go to a friend’s house, will not watch the news.

Confessing, the need to tell you every small thing she thinks she has done wrong, can look like an unusually honest child.

The thought she is frightened to tell you

Intrusive thoughts are at the centre of OCD, and the ones that frighten children most are often about harm, about sex, or about being wicked: a thought of hurting someone she loves, an unwanted sexual image, a terror of having offended God or broken a rule beyond forgiving. Specialists in young people’s OCD describe these taboo thoughts as common. Children rarely mention them, because they are convinced that having the thought means they are bad, or that they might act on it.

In OCD, these thoughts are not wishes, and they are not warnings. NICE’s guidance notes that these themes are common in OCD at any age, and are often misread as signs of risk. A child who is horrified by a thought of harming her baby brother is not a danger to him. Her horror is part of what tells you it is OCD: these thoughts frighten the children who have them because they run against everything those children care about.

If she tells you, the most important thing is your face. Stay calm. Thank her for telling you. Tell her that thoughts like this are a known part of OCD, that many people have them, and that they say nothing about who she is or what she will do. Then get her help. You do not need her to describe the thought in detail; that is a conversation for her therapist. The exception is anything that sounds like something that has happened to her, or something someone has shown her or asked of her: let her tell you in her own words, do not promise to keep it secret, and act that day, using the routes under “If you need help right now”, at the foot of this page. If the person involved may live with her, in either home, go straight to children’s social care or the police.

One caution in the other direction. OCD is rarely dangerous in the way its thoughts suggest, but it can come with real risks: low mood alongside it, self-harm, not eating or drinking enough because of fears about contamination, or a compulsion that is physically harmful. Those are reasons to act quickly, and the box later in this chapter sets out how.

How families get drawn in

Almost every family of a child with OCD ends up helping the OCD without meaning to: answering the same question for the tenth time, checking the door so that she can sleep, waiting while she washes, saying goodnight in exactly the right words and the right order. Some families avoid certain words, places or foods, wash extra loads, buy extra soap or leave the light on. Researchers call this family accommodation. In one study of children with OCD, more than half of parents gave reassurance every day, and nearly half joined in the rituals daily.

It happens because it works in the short term, and because the alternative, at half past nine at night with a sobbing child, feels cruel. No parent should be ashamed of it. But it is worth understanding what it does over time. Each answer brings relief for a few minutes and, on the usual explanation, teaches her brain that the doubt was worth answering, which can keep the question coming back. Studies have linked more accommodation with more severe symptoms, though they have not shown that one causes the other, and in some studies children did better when their families reduced it during treatment.

### What to do instead

None of this means stopping everything overnight. Withdrawing all help at once, without warning, usually produces a great deal of distress and a family at war, and NICE’s guidance is that families should be helped to step back from the rituals in a sensitive and supportive way, ideally alongside a therapist.

Map it first. For a week, without changing anything, write down every way the family bends around the OCD: the questions you answer, the things you check, the routines you have changed, the places you avoid. Most families are surprised by how long the list is.

Give it a name. Many children find it easier to fight OCD when it is something separate from them, a bossy voice or a worry bully with a name of her choosing, rather than part of who they are. The American psychiatrist John March built a whole approach around this, teaching children to boss the OCD back. It also puts you on her side: you are not refusing her, you are refusing it.

Change one thing, with warning. Choose one small accommodation to reduce, tell her in advance what will change and why, and keep to it kindly. “From tonight I’m going to check the back door once, and then I’m not going to check it again, because I think that’s what the OCD wants and I don’t want it bossing us both about.”

Answer with confidence, not reassurance. When the question comes, the most helpful response acknowledges how hard this is and expresses confidence that she can cope: “I know this feels really frightening. I also know you can handle it.” This comes from SPACE, a programme developed at Yale that works through parents alone, and that did as well as therapy with the child in a trial with anxious children. Its trials so far have mostly been in anxiety, and randomised trials in OCD are still under way, but its central idea, acknowledgement and confidence together, is a sound one.

Keep reassurance short, and do not argue with the content. If you do answer, answer once and briefly. Trying to prove that the door is locked, that her hands are clean or that she is a good person invites the OCD to find the next doubt. Better to say: “That sounds like the OCD asking. I love you, and I’m not going to answer it again tonight.” The library’s quick tip When She Needs You to Say It Again goes through this in more detail.

Never punish rituals. They are not naughtiness, and she is not choosing them. What you are asking of her is hard, and progress is worth noticing out loud.

The treatment that works

The good news is that OCD in children responds well to the right treatment, and the treatment is well established.

NICE names CBT with exposure and response prevention, involving the family, as the treatment of choice for children and young people with OCD, with guided self-help, supported by the family, an option to try first when the OCD is mild. Exposure and response prevention means facing feared situations gradually, in small planned steps that she helps to choose, without carrying out the compulsion. That lets her brain learn two things it cannot learn while the rituals continue: that the anxiety falls on its own if she waits, and that what she feared does not happen, or that she can live with not being sure. It is hard work, done at a pace she can manage, with a therapist who knows how.

The evidence is strong. In a major American trial with children and teenagers, CBT and medication each eased symptoms more than a placebo did, and the two together eased them most, though the combination did not clearly get more children well than CBT alone; a later trial found that family-based CBT helped children as young as five. Across trials, around seven in ten children respond to CBT, more than respond to medication alone, and adding medication to CBT does not, on average, add much. A Swedish trial found that starting with CBT delivered online, and moving to face-to-face treatment for the children who needed more, worked as well as face-to-face treatment from the start.

Medication still has a place. Where CBT has not helped enough, an SSRI antidepressant may be added to it: for children, sertraline or fluvoxamine, or fluoxetine if depression is part of the picture. NICE’s current guidance is that for under-eighteens this should follow assessment by a child and adolescent psychiatrist, with careful monitoring in the first weeks: tell the prescriber the same day about any new agitation, hostility or self-harm, or any talk of not wanting to be alive. On average medication helps less than CBT, but for some young people it is what makes the therapy possible.

A word on counselling. Non-directive counselling has real value for many of the difficulties children face. It is not, on its own, the treatment for OCD. If your child has OCD, look for a therapist trained in CBT with exposure and response prevention who will involve you. In the NHS that usually means children’s mental health services, where waits for OCD treatment are often long, so ask what is available meanwhile. Privately, the register of the British Association for Behavioural and Cognitive Psychotherapies lists accredited CBT therapists, and clinical psychologists are registered with the Health and Care Professions Council. The charity OCD-UK points out that “therapist” is not a protected title, so it is worth checking.

For a small number of young people with severe OCD that has not responded to good treatment, there is a national specialist service for children and teenagers at the Maudsley Hospital in London, reached through local children’s mental health services.

### When it arrives suddenly

Occasionally, symptoms like these appear almost overnight in a child who had none, sometimes after an infection, and sometimes alongside other new problems, such as wetting the bed again or handwriting that suddenly deteriorates. You may come across the terms PANS and PANDAS. The science here is unsettled. In 2021 the UK’s paediatric neurologists said the evidence was not strong enough to recommend antibiotics or immune treatments for it, and practice still varies across the country. Everyone agrees that a sudden onset needs a prompt GP appointment and a full medical assessment, because other conditions can start this way; call 999 if she also becomes confused or has a fit. Most children with this picture respond to the usual treatments, CBT included.

### What else may be going on

OCD often keeps company with other things. Tics are common in children with OCD, and so are anxiety and low mood, which the library’s chapters When Reassurance Stops Working and When Your Child Has Gone Flat cover. Autistic children can have repetitive behaviours and strong routines that are not OCD at all. The usual difference is that a compulsion answers a frightening thought, or a sense that something is not right, and she would rather not have to do it, while a routine or a favourite activity is wanted, and often enjoyed for its own sake. Autistic children can also have OCD. Perfectionism can look similar, and the useful question is whether she values the standard or is tormented by it. In older teenagers, OCD can overlap with worries about appearance, known as body dysmorphic disorder, and with eating difficulties. A good assessment looks at all of this.

Telling the school

NICE recommends that the people treating a child’s OCD work with her school, and for good reason. At school its signs are easy to miss: lateness, slowness, work rubbed out and rewritten, repeated trips out of the room, avoiding the toilets, exhaustion. Tell the pastoral lead or the SENCo what you know, and what the plan is at home, so that school can follow the same approach rather than feeding the OCD with extra reassurance. Practical adjustments, such as extra time, a named adult or somewhere calm to go, can help while treatment is under way. If she has a therapist, ask whether they can talk to the school directly.

At different ages

The bands below are descriptions, not boxes.

If your child is between five and seven. Rituals are still common at this age, so watch for fear, time and distress rather than for rituals themselves. When OCD does start this young, bedtime is often where it shows: the goodnight that has to be perfect, the checking, the questions. Family-based CBT works at this age, and much of it happens through you.

If your child is between seven and eleven. Childhood OCD often begins at these ages, and this is when it is most often hidden, because children of this age are old enough to feel embarrassed and too young to explain. Homework rewritten until it looks right, handwashing, evening things up and repeated questions at bedtime are all common. Giving the OCD a name works especially well at this age. Amita Jassi’s Can I Tell You About OCD?, a short illustrated book in which a teenager called Katie explains her OCD, is one to read together.

If your child is in early secondary, eleven to thirteen. Intrusive thoughts often become more prominent, and so does shame. She may seek reassurance by text through the school day, or check things online. The social cost of rituals rises, and she may work hard to hide them at school and let them out at home. Keep the conversation about the OCD, not about her.

If your child is mid to late teen, thirteen to eighteen. OCD in older teenagers looks more like OCD in adults, with more of the compulsions happening in the head. She should be at the centre of decisions about her treatment, and she can contact services and charities herself; OCD Action runs online groups for teenagers from fourteen, and both charities publish information for young people. If she is approaching sixteen or eighteen, ask early how the move to adult services works in your area.

Your part, and your own worry

It is very hard to watch your child in distress and not do the thing that would end it. Accommodation comes from love, and stepping back from it can feel cruel, especially in the early weeks, when the OCD often protests loudly. Distress that comes from facing a fear, with support, is part of getting better.

Parents often disagree about this, one more willing to hold the line and the other more inclined to give in, and the OCD will find the gap between you. Agree a plan together, ideally with her therapist, and back each other up.

OCD and anxiety run in families. If you recognise some of this in yourself, that is not a failing, and it may be worth getting help of your own; children learn a great deal about uncertainty from watching how their parents live with it. Brothers and sisters are affected too. They wait while rituals finish, avoid certain words, and sometimes resent the attention. They need an explanation suited to their age, and some time of their own.

The longer arc

With the right treatment, most children with OCD improve a great deal, and for many the improvement lasts. OCD can return at times of stress, which is why the skills she learns in treatment, and the family’s understanding of how OCD works, are worth keeping long after the worst is over. Children who have been through this often come out of it unusually good at something many adults never learn: noticing a frightening thought, and choosing not to obey it.

The nine-year-old asking about the back door does not need her father to stop checking all at once, and she certainly does not need him to stop being kind. She needs him to understand what is doing the asking, to get her to someone who knows how to help, and, one night soon, to check once, say goodnight, and stay on the landing until the worry, finding no one to argue with, runs out of breath.

NOTES

1. Heyman, I. et al. “Prevalence of obsessive-compulsive disorder in the British nationwide survey of child mental health.” British Journal of Psychiatry, 2001. NHS Digital. Mental Health of Children and Young People in England, 2017: Emotional Disorders. 2018. Krebs, G. and Heyman, I. “Obsessive-compulsive disorder in children and adolescents.” Archives of Disease in Childhood, 2015. OCD in 0.25% of five- to fifteen-year-olds in 1999, with only three of twenty-five seen by specialist services; 0.4% of five- to nineteen-year-olds in 2017; estimates of 0.25% to 4% across studies; taboo obsessions as common; tics and other conditions alongside OCD; OCD running in families.
2. Taylor, S. “Early versus late onset obsessive-compulsive disorder: evidence for distinct subtypes.” Clinical Psychology Review, 2011. Early onset averaging around eleven and more common in boys; later onset averaging around twenty-three.
3. Evans, D. W. et al. “Ritual, habit, and perfectionism: the prevalence and development of compulsive-like behavior in normal young children.” Child Development, 1997.
4. NICE. Obsessive-Compulsive Disorder and Body Dysmorphic Disorder: Treatment (CG31). National Institute for Health and Care Excellence, 2005. Intrusive themes often misread as risk (1.4.1.3) and the assessment of real risk (1.4.1.2); guided self-help for mild OCD (1.5.1.8); CBT including exposure and response prevention, involving the family, as the treatment of choice (1.5.1.9); helping families reduce their involvement in a sensitive and supportive manner (1.5.2.9); liaison with the school (1.5.2.12); medication for children and young people (1.5.5 and 1.5.6). A draft update, Obsessive-Compulsive Disorder and Body Dysmorphic Disorder: Assessment and Management, which will replace CG31, was out for consultation from 17 September to 21 October 2026, with final guidance expected in February 2027; its recommendation 1.6.1 gives an hour a day as an example of how much time symptoms take up.
5. Peris, T. S. et al. “Correlates of accommodation of pediatric obsessive-compulsive disorder: parent, child, and family characteristics.” Journal of the American Academy of Child and Adolescent Psychiatry, 2008. Wu, M. S. et al. “A meta-analysis of family accommodation and OCD symptom severity.” Clinical Psychology Review, 2016. Merlo, L. J. et al. “Decreased family accommodation associated with improved therapy outcome in pediatric obsessive-compulsive disorder.” Journal of Consulting and Clinical Psychology, 2009.
6. March, John S., with Christine M. Benton. Talking Back to OCD. Guilford, 2006.
7. Lebowitz, E. R. et al. “Parent-based treatment as efficacious as cognitive-behavioral therapy for childhood anxiety: a randomized noninferiority study of Supportive Parenting for Anxious Childhood Emotions.” Journal of the American Academy of Child and Adolescent Psychiatry, 2020.
8. OCD-UK. “What are compulsions?”, on reassurance seeking as a compulsion. OCD-UK. “Unqualified & unlicensed ‘OCD therapists’ exploiting vulnerable people.” 2025, on “therapist” as an unprotected title.
9. Pediatric OCD Treatment Study (POTS) Team. “Cognitive-behavior therapy, sertraline, and their combination for children and adolescents with obsessive-compulsive disorder: the Pediatric OCD Treatment Study (POTS) randomized controlled trial.” JAMA, 2004. Freeman, J. et al. “Family-based treatment of early childhood obsessive-compulsive disorder: the Pediatric Obsessive-Compulsive Disorder Treatment Study for Young Children (POTS Jr): a randomized clinical trial.” JAMA Psychiatry, 2014.
10. Öst, L.-G., Riise, E. N., Wergeland, G. J., Hansen, B. and Kvale, G. “Cognitive behavioral and pharmacological treatments of OCD in children: a systematic review and meta-analysis.” Journal of Anxiety Disorders, 2016. Response rates of about 70% for CBT, 66% for CBT combined with medication and 49% for medication alone.
11. Aspvall, K. et al. “Effect of an internet-delivered stepped-care program vs in-person cognitive behavioral therapy on obsessive-compulsive disorder symptoms in children and adolescents: a randomized clinical trial.” JAMA, 2021.
12. British Paediatric Neurology Association. Consensus Statement on Childhood Neuropsychiatric Presentations, with a Focus on PANDAS/PANS. BPNA, 2021. PANS PANDAS Working Group. PANS PANDAS Working Group Statement. 2023, on full medical evaluation and variation in practice.
13. South London and Maudsley NHS Foundation Trust. Child and Adolescent Obsessive Compulsive Disorder Service.
14. Öst, L.-G. et al. “Long-term follow-up of cognitive behavior therapy for obsessive-compulsive disorder in adults and children: a systematic review and meta-analysis.” Cognitive Behaviour Therapy, 2026.
15. Great Ormond Street Hospital. “Tourette syndrome and OCD in the classroom.” Anna Freud. “Supporting children and young people with obsessive compulsive disorder (OCD).” The signs at school, and the adjustments that help.

Where to go further

Jo Derisley, Isobel Heyman, Sarah Robinson and Cynthia Turner, Breaking Free from OCD Written by specialists in young people’s OCD as a step-by-step CBT guide for teenagers of thirteen to eighteen and their families. The most practical book we know for a family about to start facing OCD together.

Eli R. Lebowitz, Breaking Free of Child Anxiety and OCD The SPACE programme, written for parents: how to answer a fear with acknowledgement and confidence instead of reassurance, as this chapter describes.

Amita Jassi, Can I Tell You About OCD? A short illustrated book in which Katie, a teenager with OCD, explains it in her own words, written by a clinical psychologist from the Maudsley’s young people’s OCD service. Good to read with an adult, and to share with brothers, sisters and teachers.