Bipolar disorder is divided into several subtypes. Each has a different pattern of symptoms.

Bipolar I disorder. Mood swings with bipolar I cause significant difficulty in your job, school or relationships. Manic episodes can be severe and dangerous.

Bipolar II disorder. Bipolar II is less severe than bipolar I. You may have an elevated mood, irritability and some changes in your functioning, but generally you can carry on with your normal daily routine. Instead of full-blown mania, you have hypomania — a less severe form of mania. In bipolar II, periods of depression typically last longer than periods of hypomania.

Cyclothymic disorder. Cyclothymic disorder, also known as cyclothymia, is a mild form of bipolar disorder. With cyclothymia, hypomania and depression can be disruptive, but the highs and lows are not as severe as they are with other types of bipolar disorder.

Types of Bipolar disorder: