Oppositional Defiant Disorder (ODD) is a childhood behavior disorder that causes extreme anger, irritability, and defiance towards authority figures such as parents, teachers, and other adults. Children with ODD often argue with authority figures, refuse to follow rules, and deliberately annoy others. Symptoms of ODD may include throwing repeated temper tantrums, excessively arguing with adults, actively refusing to comply with requests and rules, and trying to annoy or upset others.

ODD is typically diagnosed around early elementary school ages and stops being diagnosed around adolescence. A child psychiatrist or qualified mental health expert can diagnose ODD by talking with the parents and teachers about the childs behavior and may observe the child. In some cases, the child may need mental health testing.

ODD is a complex problem, and possible risk factors for ODD include temperament, developmental problems, biological factors, and environmental factors. Treatment for ODD varies based on many factors, including the childs age, the severity of their symptoms, and their ability to take part in and tolerate specific therapies. Treatment usually consists of a combination of parent management training and family therapy. Early intervention and treatment are important, as children with untreated ODD may continue to be difficult and antisocial into their adult years.