Mania vs Hypomania
Mania
Elevated or irritable mood with increased energy lasting at least a week (or any length if hospitalized), causing marked impairment or psychosis.
Hypomania
Similar features lasting at least four days, noticeable to others but without marked impairment or psychosis.
where they overlap
Both involve a distinct shift in mood and energy.
the key difference
Severity and impact on functioning.