Double depression is a term used to describe a condition where someone experiences both major depressive disorder (MDD) and persistent depressive disorder (PDD), also known as dysthymia, simultaneously. In this state, individuals not only suffer from the acute symptoms of MDD but also endure the chronic low mood characteristic of PDD. This combination can result in a more severe and long-lasting form of depression, often requiring specialized treatment approaches tailored to address both components effectively. Understanding what double depression entails is crucial for accurate diagnosis and the development of appropriate intervention strategies to help individuals manage and overcome this challenging condition.