Identifying BD in youth is challenging. While adults with BD often have distinct periods of depression and mania that last for weeks, months, or longer, youth diagnosed with BD frequently have depressive and manic symptoms that occur daily, and sometimes simultaneously either as rapid shifts or periods of high energy negative mood.[5] Comorbid disorders are common, which makes determining what symptoms are signs of BD and which are due to other disorders (e.g., depression, ADHD, disruptive behavior problems) crucial both for accurate diagnosis and effective treatment.