There is another face of depression that is less recognized but is prevalent, especially among intelligent, young professionals. Persistent depressive disorder (PDD), formerly known as dysthymia, is a low-grade, persistent depression that has been present for at least two years in adults (or 1 year in youth below age 18.) People often refer to PDD as “high-functioning depression,” meaning that a person suffering from it can often hold a demanding job, engage in personal and intimate relationships, and even cover it up to the point that those around them would classify them as “happy” or “energetic.” The reality is that those experiencing PDD are often physically and emotionally exhausted, feel sad or hopeless frequently, tend to question themselves, are easily irritated, and are more likely to struggle with regular, healthy sleep and/or eating patterns.