Bipolar 1 disorder:
Bipolar I disorder is defined as being present if the person experiences one or more lifetime episodes of maniaand usually episodes of depression. The severity and duration of episodes are often severe and may result in hospitalisation.
Bipolar II Disorder:
Bipolar II disorder is defined as being present if the person experiences episodes of both hypomania and depression but no manic episodes. The severity of the highs does not lead to hospitalisation.
Six key features of mania and hypomania
What separates normal ‘happiness’ from the euphoria or elevation, which is seen in mania and hypomania. These features are:
High energy levels