Conduct Disorder

Overview

Conduct disorder is a behaviour condition that affects children and teenagers. It means a young person shows a steady pattern of behaviour that breaks rules and goes against the rights of other people. This might include being very aggressive, lying, stealing, damaging things on purpose, or seriously breaking rules at home, at school or in the community. It is not the same as normal testing of limits or the occasional tantrum. The pattern is long-lasting (usually at least 6 to 12 months) and it causes real problems in everyday life. Conduct disorder is a recognised health condition, not a sign that a child is 'bad' or that parents have failed. With the right support, things can and do improve.

It is fairly common. Studies around the world suggest that roughly 2 to 5 out of every 100 children and teenagers have conduct disorder at some point. It is one of the more common reasons children are referred to children's mental health services.

It mostly affects children and teenagers, often starting between the ages of 5 and 16. More boys than girls are diagnosed in childhood, though in the teenage years the numbers become closer. It happens in families of every background. Many young people with conduct disorder also have other difficulties, such as attention and hyperactivity problems (ADHD), difficulties with reading or learning, anxiety or low mood.

Symptoms

Common symptoms

• Frequent arguing with adults and refusing to follow reasonable requests
• Losing their temper often and seeming angry or resentful much of the time
• Blaming other people for their own mistakes
• Lying, or conning others to get what they want
• Being physically aggressive, such as hitting, pushing or getting into fights
• Bullying, threatening or intimidating other children
• Damaging or destroying property on purpose
• Stealing, shoplifting, or taking things that do not belong to them
• Skipping school or staying out very late without permission
• Little or no guilt or concern after hurting someone
• Being cruel to animals
• Starting fires or doing other risky, dangerous things

Symptoms in children

• Very frequent tantrums that go on longer and are more intense than expected for the child's age
• Hitting, biting, kicking or pushing other children
• Refusing most instructions and arguing with teachers or parents
• Lying about small and big things
• Taking things that belong to others
• Being unkind or rough with pets and animals
• Being disliked or avoided by other children because of their behaviour

Symptoms in older adults

• Conduct disorder is normally diagnosed in childhood or the teenage years, so there is no separate 'older adult' form.
• In teenagers, the behaviour may become more serious, such as fighting, vandalism, stealing, running away from home, or using alcohol or drugs.
• In some people the difficulties continue into adult life, and doctors may then use a different medical term. If you are an adult worried about long-standing behaviour patterns, it is worth talking to your doctor.
• For parents and carers: it is also common to feel exhausted, blamed or isolated. Your own support matters too.

Causes

Main causes

• Genes: conduct disorder tends to run in families, so inherited brain and temperament traits play a part.
• Brain development: the parts of the brain involved in self-control and understanding other people's feelings develop at different speeds in different children.
• Family environment: harsh, inconsistent or very chaotic discipline can make rule-breaking more likely.
• Stress and trauma: neglect, abuse, bereavement, or growing up around violence are important factors.
• Peer influence: mixing with others who break rules can reinforce the behaviour, especially in the teenage years.
• Other difficulties: untreated ADHD, learning difficulties or language problems can lead to frustration and rule-breaking.
• It is usually a mix of these things. It is not caused by one single event, and it is not caused by 'bad parenting' alone.

Risk factors

• A close relative with similar behaviour difficulties
• Very inconsistent rules at home, or discipline that is very harsh
• Neglect, abuse or exposure to domestic violence
• Family poverty, housing problems or lots of stress at home
• Difficulties at school, such as bullying, being behind in learning, or being excluded
• ADHD, reading difficulties or speech and language problems
• Head injury or other problems affecting brain development
• Living in an area with high levels of crime or gang activity

When to see a doctor

See a doctor urgently if:

• Someone is being hurt, or you are worried about safety at home right now
• The young person is self-harming or talking about suicide
• Aggression, threats, fire-setting or cruelty to animals is getting worse
• The young person has run away or is missing
• They are using alcohol or drugs heavily
• They have been excluded from school and there is no support plan

Book a routine appointment if:

• The behaviour has been going on for several months and is affecting home, school or friendships
• You feel blamed, judged or worn out and want practical support
• Teachers have raised concerns about behaviour, lying, fighting or rule-breaking
• Your child also has signs of ADHD, anxiety, low mood or learning difficulties
• There have been contact with police or other services
• You want help knowing where to start

Diagnosis

There is no simple blood test for conduct disorder. A doctor or child mental health specialist makes the diagnosis by talking with you, your child, and often the school. They look for a lasting pattern of behaviour that breaks rules or harms others, and they check that it has been going on for many months and is causing real problems. They will also look for other reasons behind the behaviour, such as ADHD, learning difficulties, language problems, anxiety, low mood, hearing problems, or difficult things happening at home.

Tests that may be done

• A detailed conversation about the behaviour, when it started, and how often it happens
• Behaviour questionnaires filled in by parents or carers and by teachers
• A talk with the young person on their own, in a way that suits their age
• Information from school about behaviour, attendance and learning
• Checks for other conditions such as ADHD, anxiety, depression or learning difficulties
• Hearing and vision checks if there is any concern
• Sometimes a developmental or speech and language assessment

What to expect at your appointment

The assessment is usually done by a child and adolescent mental health team, sometimes called CAMHS, and can take more than one appointment. You may be asked to bring school reports or fill in forms. You will usually be given time to ask questions. Nothing is decided about your child without talking it through with you. It can feel daunting to be assessed, so it can help to write down your worries and examples beforehand, and to bring someone with you for support.

Treatment

Treatment is about teaching skills and changing patterns, not about punishment. The most strongly recommended approach is a structured parenting programme, which helps parents and carers set clear, steady rules and use praise and calm consequences. Family therapy, support at school and help with thinking and problem-solving skills for the young person are also used. Anything else the young person is dealing with, such as ADHD, anxiety or a learning difficulty, is treated too, because this often reduces the behaviour problems. Help usually involves a team rather than one person, and it works best when home, school and health services pull in the same direction.

Self-care at home

• Keep routines as steady as possible: regular times for meals, homework, screen use and bedtime
• Give clear, short instructions, one at a time, and check the young person has understood
• Catch good behaviour and praise it straight away, even small things — this works better than only noticing problems
• Agree a small number of clear rules and consequences in advance, and apply them calmly and every time
• Try to stay calm yourself; if you feel yourself getting angry, take a short pause before responding
• Spend regular one-to-one time together doing something enjoyable that has nothing to do with behaviour
• Limit exposure to violent games or videos, and agree screen-time limits together
• Keep the school informed and ask for a named person there who can help
• Look after your own sleep, food and support network — parenting under stress is much harder
• Write down what happens and when; patterns are easier to spot and to discuss with professionals

Medical treatments

The main treatments are talking-based and skills-based: parenting programmes, family therapy, and individual work with the young person on managing anger and solving problems. School-based support plans can make a big difference, and so can help for any learning or language difficulties. Medicines are not the usual treatment for conduct disorder itself. Sometimes a specialist doctor may consider medicine for a related problem, such as ADHD, depression or anxiety, if those are present — but that decision is made by a specialist after a full assessment, and only after talking it through with the young person and their family. Always ask your own doctor or pharmacist about any medicine, and never start, stop or change one without their advice.

When is surgery considered?

Surgery is not a treatment for conduct disorder.

Living with this condition

Living with conduct disorder can be exhausting, and it is normal to feel judged, angry or guilty. Try to hold on to small, steady routines and to keep your responses calm and predictable — children do better when the adults around them are consistent. Pick your battles: focus on a few key rules at a time rather than everything at once. Keep in touch with the school, keep appointments, and record what is working. It also helps to remember that the young person is usually struggling with self-control rather than 'choosing' to be difficult, even though the behaviour still needs clear limits. Celebrate progress in small steps, because change is often slow before it shows.

Lifestyle tips

• Keep a predictable daily structure, including a calm, consistent bedtime
• Build in regular physical activity, which helps mood, sleep and restlessness
• Limit time spent with peers who get into trouble, and support friendships that are positive
• Encourage at least one activity the young person enjoys and can feel good at, such as sport, art or music
• Keep alcohol, drugs and other harmful substances out of reach, and talk openly about their risks
• Plan ahead for tricky situations such as transitions, visits or busy days
• Make time for siblings too, so they feel seen and supported
• Arrange support for yourself, such as a parenting group or a trusted friend to talk to

Diet and exercise

There is no special diet that treats conduct disorder. A balanced, regular pattern of meals helps steady mood and energy, and it is worth cutting back on very sugary drinks and late-night caffeine, which can affect sleep and restlessness. Regular movement — walking, cycling, sport, or even short bursts of active play — helps young people manage energy, sleep better and feel better in themselves. Aim for something most days that they actually enjoy, rather than a strict exercise plan.

Mental health and emotional wellbeing

Conduct disorder often comes with other emotional difficulties. Many young people with these behaviours also feel anxious, low, angry or rejected, and some have thoughts of self-harm or suicide. Parents and carers often feel blamed, isolated, or low themselves. These feelings are important and treatable, not something to push through alone. If you or your child are having thoughts of harming yourselves, please contact your local emergency number or a crisis line in your area straight away, or go to the nearest emergency department. You deserve support too — talking to your own doctor about how you are coping is a sensible step, not a sign of weakness.

Prevention

There is no guaranteed way to prevent conduct disorder, but early support can lower the risk and reduce how serious it becomes. Parenting support in the early years, help for children with difficult temperaments, and quick action on problems at school all help. Treating conditions like ADHD or language difficulties early can prevent frustration from turning into long-term rule-breaking. Reducing exposure to violence and harsh punishment at home, and building warm, consistent relationships with caring adults, are some of the strongest protective factors we know of.

Screening programmes

There is no routine screening programme for conduct disorder. Instead, doctors, health visitors and schools are encouraged to notice early signs and offer help promptly. If you are worried, it is reasonable to raise it with your doctor directly rather than wait to be asked.

Complications

If left untreated

• Difficulties at school, falling behind, and being excluded
• Problems making and keeping friends
• Family conflict and stress at home, including for brothers and sisters
• Higher chance of drinking or drug use in the teenage years
• Contact with the police or the justice system
• Low mood, anxiety, self-harm or thoughts of suicide
• Difficulties later in work and relationships if the pattern continues into adult life

Long-term outlook

The outlook is genuinely hopeful. Many children with conduct disorder improve a great deal, especially when help starts early and the whole family is involved. Some continue to have difficulties into their teenage years, and a smaller number into adult life, but support at any stage can change the path. Behaviour is learned, and learned behaviour can change with the right help, patience and time. Getting support is a sign of strength, not failure.

Find support

External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.