disruptive dysfunctional mood disorder
By John M. Grohol, Psy.D. ~ 1 min read. The defining characteristic of disruptive mood dysregulation disorder (DMDD) in children is a chronic, severe and persistent irritability.This irritability is often displayed by the child as a temper tantrum, or temper outburst, that occur frequently (3 or more times per week).y John M. Grohol, Psy.D. ~ 1 min read. The defining characteristic of disruptive mood dysregulation disorder (DMDD) in children is a chronic, severe and persistent irritability.