A child’s mental illness diagnosis can take years to get right, especially when both disruptive mood dysregulation disorder (DMDD) and a childhood bipolar disorder diagnoses are possible. One diagnosis can look similar to another. It takes a skilled provider to tease it out and, let’s face it, as parents, we don’t always know if our providers are the skilled ones. It took three years to get to my son’s diagnosis of DMDD. Prior to that, they briefly considered childhood bipolar disorder. I still sometimes wonder if it’s not.