what is the difference between bipolar 1 and 2?

How does bipolar II disorder differ from bipolar I disorder?

Bipolar II disorder is characterized by hypomanic periods preceded by depressive episodes.
The main difference between bipolar I disorder and bipolar II disorder has to do with the intensity of the manic period.
Bipolar I disorder is characterized by at least one episode of mania before or after a hypomanic or major depressive episode. Sometimes, the manic episodes that occur in bipolar I disorder may trigger a psychotic episode where the person disassociates from reality.
People with bipolar II disorder do not experience true manic episodes, where their mood and energy levels are so high that it causes trouble with work and socializing and may cause psychosis. Some individuals with bipolar I disorder have to be hospitalized during periods of mania.
However, this does not make bipolar II disorder less severe than bipolar I disorder. In bipolar II disorder, the depressive episodes are similar to those in bipolar I disorder and cause significant disruption to the person's daily life for an extended time.

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