What describes a hypomanic state?

A hypomanic state is characterized by a mild manic episode that is less severe than a full manic episode. This state typically includes elevated or irritable mood, increased energy or activity, and decreased need for sleep, but it does not significantly impair social or occupational functioning. The duration of hypomania is often recognized as lasting at least four days, which aligns with the definition provided in the context of mood disorders, particularly bipolar disorder.

In contrast, the other options describe different states or conditions that do not match the characteristics of hypomania. A deep depression lasting more than a week refers to a major depressive episode. Extreme fatigue and lethargy are symptoms more aligned with depressive states rather than hypomania. Finally, a severe mood episode requiring hospitalization typically indicates a more serious condition, such as a full manic episode or severe depression, which is far more disruptive than a hypomanic state. Thus, the understanding of a hypomanic episode specifically as a mild manic state lasting up to four days is correct.