Mania is defined as a distinct period of abnormally and persistently elevated or irritable mood lasting at least one week. It can be classified as mixed states with both manic and depressive features, hypomania with less sleep needs and increased goal-motivated behavior, or associated with bipolar disorder. Causes may include genetic, biochemical, seasonal, or stressful life influences. Signs include inflated self-esteem, decreased sleep needs, pressured speech, distractibility, and risky behaviors. Treatment involves psychological therapies and organic treatments like mood stabilizers, antipsychotics, or benzodiazepines to control symptoms.