When Rule-Breaking Turns Serious: Conduct Disorder

Key takeaways

• Conduct disorder is a repeated pattern of hurting others or breaking major rules. It requires at least three signs in the past year.
• One fight, lie, or theft is not conduct disorder. Abuse, exploitation, survival needs, and other conditions can change what behavior means.
• Safety comes first: weapons, fire, victims, and supervision.
• Treatments that involve the family and the systems around a young person have the best support. Scare tactics like “Scared Straight” can make offending worse.

A single sandbag does little against a rising river. Towns that stay dry build a levee along the whole bank, and they keep checking it. Serious rule-breaking in a young person is a lot like that river. It pushes on home, school, friendships, and the neighborhood all at once. A plan that covers only one of those places tends to leak.

This is Part 3 of a four-part series. Part 1 covers how to read a child’s hard behavior. Part 2 covers oppositional defiant disorder (ODD).

What conduct disorder is

Conduct disorder is a lasting pattern of breaking other people’s basic rights or major rules for the child’s age. A clinician looks for at least three of 15 behaviors in the past 12 months, with at least one in the past 6 months. The pattern must cause significant problems at home, school, work, or with friends.1,2

The 15 behaviors fall into four groups.

Aggression toward people or animals

• often bullying, threatening, or scaring others
• often starting physical fights
• using a weapon that can cause serious harm
• physical cruelty to people
• physical cruelty to animals
• stealing while confronting a victim, such as mugging or armed robbery
• forcing someone into sexual activity

Destroying property

• setting a fire on purpose to cause serious damage
• destroying other people’s things on purpose in other ways

Deceit or theft

• breaking into a house, building, or car
• often lying to get things or favors, or to avoid obligations
• stealing things of real value without confronting a victim, such as shoplifting or forgery

Serious rule violations

• often staying out at night against parents’ rules, starting before age 13
• running away from home overnight at least twice, or once for a long period
• often skipping school, starting before age 13

Clinicians also note when it began. Childhood onset means at least one sign appeared before age 10. Adolescent onset means none did. Unspecified onset means there is not enough information to tell.1,2

Some young people also show what clinicians call “limited prosocial emotions.” That means at least two of these, lasting at least 12 months and showing up in more than one relationship and setting: lack of remorse or guilt, lack of empathy, not caring about doing well at school or work, and shallow or limited emotions. Clinicians note it because it can shape treatment.1 It does not mean treatment cannot help.

Context changes the meaning

A single act does not make a diagnosis. Before anyone uses the label, the clinician needs to understand the situation.

• Survival: a teen who steals food or runs from an unsafe home may be responding to need or danger.
• Coercion, trafficking, or abuse: a young person may be forced into crimes or sexual activity by someone else.
• Developmental disability: the child may not understand the rule or the harm.
• Mania, psychosis, or intoxication: these call for a medical and psychiatric response first.

Clinicians also sort aggression into two broad types. Reactive aggression follows a threat, frustration, or overload. Proactive aggression is planned to get something, control someone, or gain status. The type shapes the plan.

A full evaluation checks for trauma, ADHD, learning problems, substance use, depression, and bipolar disorder. It also asks about family violence, friends, online contacts, and access to weapons. It gathers information from the young person, caregivers, school, and other involved agencies, with proper permission.

Safety comes first

When serious aggression, fire-setting, or threats are present, safety planning comes before any technique.

• Firearms: the American Academy of Pediatrics says the safest home for a child is one without guns. Any gun in the home should be locked and unloaded, with ammunition locked separately.3
• Other dangers: lock up medicines, alcohol, sharp objects, car keys, lighters, and matches.
• Victims: protect siblings, classmates, and pets. Never leave a known victim unprotected.
• Supervision: know where the young person is, who they are with, and what they do online.
• Exploitation: ask directly about older contacts, money, gifts, and pressure to do things.

The free printable family worksheet packet (PDF, 7 pages) includes a family safety plan to fill in with your child’s clinician.

If you are afraid of your child, say so plainly to the treatment team. You deserve a plan for your own safety too.

What treatment has the best evidence

Build one plan across every system

The young person may be involved with home, school, medical care, therapy, child welfare, and juvenile justice. Separate plans can pull in different directions. Ask for one coordinated plan, with written permission to share information.

Zoom

Younger children: parent training

For children ages 3 to 11, UK guidance recommends group parent training programs. The same guidance offers training programs for foster carers and guardians.4 These programs teach supervision, clear instructions, rewards, and calm, consistent consequences. A 2025 federal review found parent-focused programs reduce disruptive behavior in preschool and school-age children.5

UK guidance also recommends group social and problem-solving programs for ages 9 to 14.4

Teens: family- and community-based treatment

For ages 11 to 17, UK guidance recommends multimodal treatment such as multisystemic therapy (MST).4 MST is delivered in the home and community. It works with the young person, the family, the school, and others in the young person’s life. It typically involves three to four meetings a week for three to five months.4

The research on teens is less settled. A 2023 analysis of 17 trials found that psychosocial treatments for teens helped by the end of treatment, and treatments involving the family did best. The benefit did not hold up at later follow-up.6 A 2025 federal review also found few studies of teens, with mixed results.5 Program quality and training matter. Ask the program how it trains and supervises its staff.

Treat what travels with it

Conduct problems often come with ADHD, substance use, depression, trauma, or learning problems. Treating these is part of treating conduct disorder.

Medicine is not routine

UK guidance advises against using medicine for routine management of behavior problems.4 Some young people have severe aggression and explosive anger that good therapy and family treatment have not helped. For them, a specialist may consider short-term risperidone. Guidance calls for a review after three to four weeks and stopping at six weeks if there is no clear benefit.4

A Cochrane review found risperidone can reduce aggression and conduct problems in the short term. It also found more weight gain than placebo, about 2.4 kilograms (about 5 pounds) on average.7 Part 4 covers medicine in detail.

What to avoid

• Scared Straight and similar programs. These bring young people to prisons to frighten them. A Cochrane review of nine randomized trials found they increased later offending compared with doing nothing.8
• Shaming, hitting, and power struggles that keep growing. The American Academy of Pediatrics links hitting children to worse behavior and emotional health.9
• Suspension, expulsion, or detention as the only response. Consequences may be needed. Skills, supervision, treatment, education, and safety planning also have to change.
• Medicine without a clear target, monitoring plan, and ongoing family treatment.

Working with the school

Ask the school for a written plan. It should cover supervision, arrival and pickup, protecting other students, and online safety. It should also cover the return to school after a suspension or hospital stay.

If behavior keeps getting in the way of learning, ask in writing for a functional behavior assessment. This study of the behavior should lead to a behavior plan. Federal law adds a rule for students with disabilities. If a discipline removal changes the student’s placement, the team must decide whether the behavior was caused by the disability or closely tied to it. If it was, the school must do a functional behavior assessment and create a behavior plan, or review the one it has.10

Federal special education rules have a catch for conduct problems. A child who is “socially maladjusted” does not qualify as having an emotional disturbance on that basis alone.11 This is one more reason to ask the school to evaluate the whole child, including anxiety, depression, trauma, ADHD, and learning. IEP vs. 504 plan explains the options.

What is known and what is not

Known: Parent training helps younger children with disruptive behavior.5 Scared Straight-style programs make offending worse.8 In short-term trials, risperidone reduced conduct problems (moderate evidence) and may reduce aggression (weak evidence), at the cost of weight gain.7

Less certain: Treatment for teens has fewer good trials, and benefits may fade over time.5,6 Medicine studies are short, so long-term benefit and harm are less clear.7

When to seek urgent help

Call 911 if someone is in immediate danger, a weapon is involved, a fire has been set, or you cannot keep people safe. Move others away. Do not physically confront a young person holding a weapon.

For suicidal thoughts or a mental health or substance-use crisis:

• Call or text 988.12

For a possible overdose or poisoning:

• Call Poison Control at 1-800-222-1222, or 911 for severe symptoms.13

For suspected abuse, neglect, or exploitation of a child:

• Childhelp National Child Abuse Hotline, call or text 1-800-422-4453.14
• In California, find your county’s child abuse hotline on the state Department of Social Services website.15

Frequently asked questions

Does conduct disorder mean my child is a psychopath?

No. Conduct disorder is a diagnosis for a pattern of behavior in a child or teen. Some young people with it show limited remorse or empathy, and clinicians note this because it can shape treatment.1 Treatment aims to change the pattern.

Would a Scared Straight program shock my teen into changing?

It is more likely to backfire. Scared Straight-style programs increased later offending in randomized trials.8 Treatment that works with the family, school, and peers has better support.4

Can my child be both a victim and a person who hurts others?

Yes. A young person who hurts others can also be a victim of abuse, pressure, or exploitation. Both need attention. Protecting others and caring for the young person’s own trauma can happen in the same plan.

Is there a medicine for conduct disorder?

No medicine is approved for conduct disorder. A specialist may consider short-term risperidone for severe aggression when good therapy and family treatment have not helped.4,7

The school wants to expel my child. What can we do?

Ask whether your child has been evaluated for a disability, and request an evaluation in writing if not. If your child has an IEP or a 504 plan, or the school already had reason to think your child has a disability, ask whether a manifestation determination review is required before a long removal. Consider asking an education advocate or attorney for help.

Related reading on NP FADY

• Defiance or Fear: How to Read a Child’s Hard Behavior
• ODD in Children: When Arguing Becomes a Pattern
• Medicine for Defiance and Aggression: What It Can Do
• Lying Drops When the Truth Gets a Softer Landing
• The Rod Is Not a License to Hit Children
• IEP vs. 504 Plan: Understanding School Support Options for Students with Disabilities

References

1. American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders. 5th ed, text rev. American Psychiatric Association Publishing; 2022. doi:10.1176/appi.books.9780890425787.

2. Substance Abuse and Mental Health Services Administration. Table 17, DSM-IV to DSM-5 conduct disorder comparison. In: DSM-5 Changes: Implications for Child Serious Emotional Disturbance. SAMHSA; 2016. Accessed September 16, 2026. ncbi.nlm.nih.gov

3. Schaechter J; American Academy of Pediatrics Council on Injury, Violence, and Poison Prevention. Guns in the home: how to keep kids safe. HealthyChildren.org. Updated March 2, 2026. Accessed September 16, 2026. healthychildren.org

4. National Institute for Health and Care Excellence. Antisocial behaviour and conduct disorders in children and young people: recognition and management. Clinical guideline CG158. 2013, updated April 2017. Accessed September 16, 2026. nice.org.uk

5. Selph SS, Skelly AC, Dana T, et al. Psychosocial and Pharmacologic Interventions for Disruptive Behavior in Children and Adolescents: A Systematic Review. Agency for Healthcare Research and Quality; April 2025. AHRQ Publication No. 25-EHC024. doi:10.23970/AHRQEPCSRDISRUPTIVE. PMID 40393407.

6. Boldrini T, Ghiandoni V, Mancinelli E, Salcuni S, Solmi M. Systematic review and meta-analysis: psychosocial treatments for disruptive behavior symptoms and disorders in adolescence. J Am Acad Child Adolesc Psychiatry. 2023;62(2):169-189. doi:10.1016/j.jaac.2022.05.002. PMID 35551985.

7. Loy JH, Merry SN, Hetrick SE, Stasiak K. Atypical antipsychotics for disruptive behaviour disorders in children and youths. Cochrane Database Syst Rev. 2017;8(8):CD008559. doi:10.1002/14651858.CD008559.pub3. PMID 28791693.

8. Petrosino A, Turpin-Petrosino C, Hollis-Peel ME, Lavenberg JG. ‘Scared Straight’ and other juvenile awareness programs for preventing juvenile delinquency. Cochrane Database Syst Rev. 2013;(4):CD002796. doi:10.1002/14651858.CD002796.pub2. PMID 23862186.

9. Sege RD, Siegel BS; Council on Child Abuse and Neglect; Committee on Psychosocial Aspects of Child and Family Health. Effective discipline to raise healthy children. Pediatrics. 2018;142(6):e20183112. doi:10.1542/peds.2018-3112. PMID 30397164.

10. Authority of school personnel. 34 CFR § 300.530. Accessed September 16, 2026. ecfr.gov

11. Child with a disability. 34 CFR § 300.8. Accessed September 16, 2026. ecfr.gov

12. 988 Suicide & Crisis Lifeline. Call or text 988, or chat at 988lifeline.org. Accessed September 16, 2026. 988lifeline.org

13. Poison Control, National Capital Poison Center. Get help online or call 1-800-222-1222. Accessed September 16, 2026. poison.org

14. Childhelp National Child Abuse Hotline. Call or text 1-800-422-4453. Accessed September 16, 2026. childhelphotline.org

15. California Department of Social Services. Report child abuse: county child protective services hotlines. Accessed September 16, 2026. cdss.ca.gov

This article is for education only. It does not diagnose conduct disorder or any other condition, and it does not replace an evaluation by a licensed clinician, a school evaluation, or legal advice. Reading it does not create a clinician-patient relationship. Evidence checked through September 16, 2026.

If you or someone you know is in crisis

• Call 911 or go to your nearest emergency room for any life-threatening emergency.
• 988 Suicide & Crisis Lifeline — call or text 988, or chat at 988lifeline.org, available 24/7, free and confidential. En español: marque 988 y oprima 2, o envíe AYUDA al 988. Deaf or hard of hearing: 988 videophone (ASL) or TTY 711 then 988. Veterans: 988 and press 1, or text 838255.
• Crisis Text Line — text HOME to 741741.
• The Trevor Project (crisis support for LGBTQ+ young people) — call 1-866-488-7386, or text START to 678-678.
• National Sexual Assault Hotline (RAINN) — call 1-800-656-HOPE (4673) or text HOPE to 64673; free, confidential, 24/7. Online chat at RAINN.org/hotline.
• National Domestic Violence Hotline — call 1-800-799-SAFE (7233) or text START to 88788; 24/7, help in 200+ languages. Online chat at TheHotline.org. If your phone or computer may be monitored, calling from a safer device is an option.
• Riverside County — Inland SoCal Crisis Helpline 951-686-HELP (4357), 24/7 (Inland SoCal United Way / 211+, in partnership with RUHS-BH); Community Access, Referral, Evaluation and Support (CARES) Line 800-499-3008, 24/7.
• San Bernardino County — Access Unit (Behavioral Health Helpline) 888-743-1478, 24/7; Mobile Crisis/CCRT 800-398-0018 (24/7, all ages) or text 909-420-0560. Arrowhead Regional Medical Center (ARMC) has a dedicated walk-in adolescent psychiatric ER (ages 13–17).
• Children under 13 — call 911 for immediate danger, contact your county's mobile crisis team (they respond to all ages), or go to the nearest pediatric emergency room.
• California Peer-Run Warm Line (non-crisis — someone to talk to) — call or text 1-855-600-WARM (9276); daytime and evening hours, not a 24/7 line.
• NP Fady (non-emergency) — for routine scheduling or questions, call (909) 707-6261. This line is not monitored for emergencies.