Mood disorders are a class of mental health conditions that primarily affect your emotional state. They can cause persistent and intense sadness, elation, and/or anger. Mood disorders can significantly impact your quality of life, making it difficult to work, study, maintain relationships, and enjoy activities. There are many different types of mood disorders, including: Major depressive disorder (MDD): MDD is the most common type of mood disorder. It is characterized by periods of persistent sadness and hopelessness. Bipolar disorder: Bipolar disorder is characterized by extreme mood swings, ranging from mania (a period of elevated mood and energy) to depression. Cyclothymic disorder : Cyclothymic disorder is a milder form of bipolar disorder. It is characterized by frequent mood swings, but the swings are not as severe as those experienced with bipolar disorder. Dysthymia: Dysthymia is a chronic form of depression. It is characterized by mild but persistent depressive symptoms. Moo