Types of bipolar disorder

The course of bipolar disorder varies widely from person to person, with unpredictable differences in the pattern and frequency of the manic and depressive episodes. Some people are more prone to either mania or depression, while others alternate equally between the two types of episodes. Some have frequent mood disruptions, while others experience only a few over a lifetime. The duration and severity of each episode also differs.

Each of the four types of bipolar disorder have a unique pattern of symptoms:

Bipolar I Disorder – Mania and depression Bipolar I Disorder is the classic manic-depressive 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. Although a previous episode of major depression is not required for diagnosis, the vast majority of people with Bipolar I Disorder have experienced one. The typical course of Bipolar I Disorder involves recurring cycles between mania and depression.

Bipolar II Disorder – Hypomania and depression In Bipolar II disorder, the person doesn’t experience full-blown manic episodes. Instead, the illness involves episodes of hypomania and severe depression. 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, also known as cyclothymic disorder, 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.

Rapid Cycling – Frequent episodes of mania, hypomania, or depression Rapid cycling is a subtype of bipolar disorder characterized by four or more episodes of mania, hypomania, or depression within one year. The shifts from low to high can occur over a matter of days or hours. Rapid cycling can occur within any type of bipolar disorder. It usually develops later in the course of bipolar disorder, but it is sometimes just a temporary condition.