Conduct disorder is a behavioral and emotional disorder that can occur in children and teenagers. It is characterized by a pattern of disruptive and violent behavior, and a disregard for basic social standards and rules. Children with conduct disorder have difficulty following rules, respecting the rights of others, and behaving in a socially acceptable way. They may exhibit behaviors such as aggression, cruelty towards people or animals, destruction of property, lying, stealing, and truancy from school or home. Conduct disorder can be caused by a combination of biological, genetic, environmental, psychological, and social factors. Children with conduct disorder may also have other mental illnesses, such as ADHD, depression, or substance abuse. Treatment for conduct disorder typically involves psychotherapy, and in some cases, medication for coexisting disorders. It is important for children with conduct disorder to receive early and comprehensive treatment to reduce the risk of ongoing problems in adulthood.