Emotion dysregulation is a useful trait which runs across disorders, researchers have found. A study of two large samples of toddlers (1,544 children ages 1.5 to 5 years old) and school‐aged children (7,259 6–18‐year‐olds) found that equal levels of total emotion dysregulation were found across different disorders. The presence of emotion dysregulation predicted lower quality of life and a longer treatment duration, in addition to clinical diagnosis. The diagnoses of the children were internalizing, externalizing, and neurodevelopmental. In particular, the children had attention‐deficit hyperactivity disorder, autism spectrum disorder, oppositional defiant disorder/conduct disorder, and anxiety and mood disorders. Emotion dysregulation was measured by the CBCL‐Emotion Dysregulation Index, quality of life by the Kidscreen‐27, and treatment duration by electronic health records. The researchers concluded that emotion dysregulation is a clinically useful trait which can predict severity of impairment and treatment duration. Importantly, it is composed of shared features across disorders. Children and adolescents can easily be overwhelmed by emotions, but in children with mental disorders this is even more pronounced. Most definitions of emotion dysregulation include symptoms of heightened reactivity and quickness to anger, anxiety, or depression. Being able to regulate emotions means better mental and physical health, social relationships, academic performance, and work functioning. Emotion dysregulation itself, regardless of disorder, should, perhaps, be treated. More youth have emotion dysregulation than any other mental disorder. The study was conducted in the Netherlands. [Bierens, M., Hartman, C. A., Klip, H., et al. (2023, July 20). Emotion dysregulation as cross‐disorder trait in child psychiatry predicting quality of life and required treatment duration. Front Psychiatry, 14, 1101226. http://doi.org/10.3389/fpsyt.2023.1101226.]