Children and young people who have difficulty forming relationships owing to persistent antisocial behaviours such as lying, breaking of rules, aggression, stealing, defiance of authority, and cruelty may have disruptive behaviour disorder. Many children will show some of these behaviours occasionally but it is the pattern of consistency which suggests a mental health disorder. ‘Disruptive behaviour disorder’ is an overarching label for a range of conditions including oppositional defiant disorder and conduct disorder. A coordinated approach to dealing with the disorder involving the child or young person's school, family, and other professionals is necessary, via a combination of treatments embracing therapy (see child and adolescent mental health services), specialist parent training, and possibly medication. See also pupil referral unit.