Discuss the differences between major depressive disorder and bipolar disorder.

Major Depressive Disorder (MDD) and Bipolar Disorder (BD) are two distinct but related mood disorders characterized by significant changes in an individual's mood, energy, and overall functioning. Despite some overlapping symptoms, they have key differences in terms of mood presentation, symptom duration, and overall course. Here's an in-depth discussion of the differences between Major Depressive Disorder and Bipolar Disorder: Major Depressive Disorder (MDD): 1. Mood Presentation: - Depressive Episodes: MDD is primarily characterized by recurrent depressive episodes. These episodes involve pervasive and persistent feelings of sadness, hopelessness, and a loss of interest or pleasure in previously enjoyable activities. Individuals with MDD predominantly experience periods of low mood and may have difficulty experiencing positive emotions. 2. Duration: - Unipolar: MDD is often referred to as "unipolar" depression because individuals with this disorder experience only depressive episodes. There are no manic or hypomanic episodes in MDD. 3. Symptom Severity: - Severity Consistency: While the severity of depressive symptoms can vary, they remain within the depressive spectrum throughout the course of the i....