There are several types of bipolar disorder. Each type is identified by the pattern of episodes of mania and depression. The treatment that is best for you may differ depending on the type of bipolar disorder you have. Your doctor will look carefully to determine where your symptoms fit.
Bipolar I Disorder (mania and depression)
Bipolar I disorder is the classic form of the illness, as well as the most severe type of bipolar disorder. It is characterized by at least one manic episode or mixed episode. The vast majority of people with bipolar I disorder have also experienced at least one episode of major depression, although this isn’t required for diagnosis.
Bipolar II Disorder (hypomania and depression)
Mania is not involved in bipolar II disorder. Instead, the illness involves recurring episodes of major depression and hypomania, a milder form of mania. In order to be diagnosed with bipolar II disorder, you must have experienced at least one hypomanic episode and one major depressive episode in your lifetime. If you ever have a manic episode, your diagnosis would be changed to bipolar I disorder.
Cyclothymia (hypomania and mild depression)
Cyclothymia is a milder form of bipolar disorder. Like bipolar disorder, cyclothymia consists of cyclical mood swings. However, the highs and lows are not severe enough to qualify as either mania or major depression. To be diagnosed with cyclothymia, you must experience numerous periods of hypomania and mild depression over at least a two-year time span. Because people with cyclothymia are at an increased risk of developing full-blown bipolar disorder, it is a condition that should be monitored and treated.