Bipolar disorder in children, or pediatric bipolar disorder (PBD), is a controversial mental disorder in children and adolescents that is mainly diagnosed in the United States, and is hypothesized to be like bipolar disorder (BD) in adults, thus is proposed as an explanation for extreme changes in mood and behavior accompanying periods of depressed or irritable moods and periods of elevated moods so called manic or hypomanic episodes. These shifts are sometimes quick, but usually are gradual. The average age of onset of pediatric bipolar disorder is unclear, but the risk increases with the onset of puberty. Bipolar disorder is rare in childhood. Pediatric bipolar disorder is typically more severe and has a poorer prognosis than bipolar disorder with onset in late-adolescence or adulthood. The has specified that the criteria for bipolar disorder can be applied to children since 1980. However, the exact criteria for diagnosing pediatric bipolar disorder remains controversial and heavily debated. There are big differences in how commonly it is diagnosed across clinics and in different countries. There has been a rapid increase in research on the topic, but training and clinical practice lag behind. Identifying bipolar disorder in youth is challenging. Children often exhibit chronic rather than episodic mania periods. Almost always, these chronic problems have causes other than bipolar disorder. The criteria for pediatric bipolar disorder can also often be masked by developmental differences. Comorbid disorders make determining what symptoms are signs of bipolar disorder and which are due to other disorders (e.g., OCD, ADHD, disruptive behavior problems) difficult, leading to complications in treatment. For example, a common treatment for OCD are serotonin re-uptake inhibitors (SRIs), however, SRIs can lead to mood instability and worsening bipolar disorder. The most common misdiagnosis for ADHD in the USA is pediatric bipolar disorder due to hyperactivity being described as prolonged periods of mania. Empirical research conducted in 2004 found that "bipolar disorder (in preadolescence) was initially misdiagnosed in 12 out of 24 youths" (Mahoney, 2004). This is a dangerous misdiagnosis due to the vastly different treatment forms. Firstly, ADHD does not require mood stabilizers like pediatric bipolar disorder. Secondly, the stimulants given to treat ADHD have been shown to cause psychosis and exacerbate mania in pediatric bipolar disorder (Wendling, 2009). This misuse of medication can lead to mood episodes, suicidality, and hospitalization. Diagnosis Diagnosis is made based on a clinical interview by a psychiatrist or other licensed mental