thumb|400px|Simplified graphical comparison of bipolar I, bipolar II and cyclothymia Hypomania (literally "under mania" or "less than mania") is a psychiatric behavioral syndrome characterized essentially by an apparently non-contextual elevation of mood (i.e., euphoria) that contributes to persistently disinhibited behavior.
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thumb|400px|Simplified graphical comparison of bipolar I, bipolar II and cyclothymia Hypomania (literally "under mania" or "less than mania") is a psychiatric behavioral syndrome characterized essentially by an apparently non-contextual elevation of mood (i.e., euphoria) that contributes to persistently disinhibited behavior.
The individual with the condition may experience irritability, not necessarily less severe than full mania; the presence of marked irritability is a documented feature of hypomanic and mixed episodes in bipolar II disorder. According to DSM-5 criteria, hypomania is distinct from mania in that there is no significant functional impairment; mania, by DSM-5 definition, does include significant functional impairment and may have psychotic features.
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