What Is Bipolar Disorder Bipolar disorder is a mood condition marked by recurring episodes of depression and mania or hypomania. These shifts are not simple mood changes. They reflect significant changes in energy, sleep, thinking, and behavior that can disrupt daily life. Bipolar disorder is a lifelong condition, but with proper treatment many people achieve long term stability. Common Symptoms of Bipolar Disorder Depressive Episodes May Include: Persistent sadness Low moti