Understanding Major Depressive Disorder (MDD): Symptoms & Impact

Major depressive disorder (MDD)

MDD is the most common type of MSD, affecting over 21 million adults in the United States each year. It is characterized by a period of at least two weeks of low mood, accompanied by other symptoms such as loss of interest in activities, changes in appetite or sleep, and feelings of worthlessness or guilt. MDD can be severe and debilitating, and can lead to problems with work, school, and relationships.