Bipolar disorder is a mental illness characterized by periods of depression and mania. During mania, people experience happiness, excitement, and increased energy, while depression causes low energy, loss of interest, and difficulty making decisions. Bipolar disorder can negatively impact self-esteem, judgment, concentration, and increase the risk of suicide. While the causes are not fully known, genetics and imbalances in brain chemistry likely play a role. Treatment involves medication and psychotherapy to manage mood swings and develop coping strategies. Common medications include lithium, Zyprexa, Seroquel, and Abilify. With proper treatment and support, many people with bipolar disorder can lead happy, successful lives.