Major Depressive Disorder (MDD): Understanding Symptoms, Causes, Diagnosis, and Effective Treatment Major Depressive Disorder (MDD) is more than feeling sad or having a difficult week—it is a medical condition that involves the body, mood, and thoughts and can seriously impair...
Persistent Depressive Disorder (PDD): Living With Long-Term, Low-Grade Depression Persistent Depressive Disorder (PDD)—also known as Dysthymia—is a continuous, long-term (chronic) form of depression. Unlike a single, intense episode of major depression, PDD often unfolds as a muted but persistent low...