A mood disorder is a mental health condition that primarily affects your emotional state, leading to prolonged periods of extreme happiness, extreme sadness, or both. Some mood disorders may also involve persistent emotions such as anger and irritability.
While it's normal for moods to fluctuate with different situations, a mood disorder is diagnosed when symptoms persist for several weeks or longer. These disorders can significantly impact your behavior and hinder your ability to perform everyday activities, such as work or school.
Common mood disorders include:
Major depressive disorder (MDD)
MDD causes extreme feelings of despair and hopelessness that last for months.