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Mania: a plain-language definition
Mania is a distinct period of abnormally elevated or irritable mood and increased energy severe enough to impair functioning, sometimes with psychosis. A full manic episode defines bipolar I disorder.
Medically reviewed by Shariq Refai, MD, MBA, FAPA, board certified psychiatrist · Last reviewed June 8, 2026 · Editorial policy
Definition
What mania means
Mania is a distinct period of abnormally and persistently elevated, expansive, or irritable mood paired with increased energy or activity. In the DSM-5-TR it lasts at least one week, or any duration if hospitalization is needed, and includes several symptoms such as inflated self-esteem or grandiosity, sharply reduced need for sleep, rapid speech, racing thoughts, distractibility, and risky or excessive activity. By definition, mania causes marked impairment, and it can include psychosis.
In practice mania is a clear and often dramatic departure from a person's usual self. Someone may go days on little sleep without feeling tired, start grand projects, spend impulsively, talk so fast that others cannot interrupt, or feel uniquely capable or chosen. Judgment is affected, so the person may not see the change as a problem in the moment, which is why family often raise the alarm. When psychosis is present, the person may hold delusions or experience hallucinations.
This matters because a full manic episode is what defines bipolar I disorder, and it is a medical situation that often needs prompt, sometimes urgent, treatment. Mood stabilizers like lithium and atypical antipsychotics are the core of acute treatment, and antidepressants are generally avoided or used with great caution because they can fuel mania. After the episode, maintenance treatment aims to prevent the next one.
A common misconception is that mania simply means being very happy or energetic. It is more than a good mood; it is an impairing, often risky state that can include irritability and psychosis rather than euphoria. Another misread is that a person in mania is choosing the behavior freely. During an episode, judgment and insight are genuinely affected, which is why support and timely care matter so much.
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Frequently asked questions
Good questions, clear answers
Is mania the same as hypomania?
No. Mania is more severe, lasts at least a week, causes marked impairment, and can include psychosis or require hospitalization. Hypomania is milder, lasts at least four days, and does not cause severe impairment or psychosis.
Does mania define bipolar disorder?
A full manic episode defines bipolar I disorder. Bipolar II involves hypomania and major depression without full mania. Both are part of the bipolar spectrum.
Can mania be treated?
Yes. Acute mania is treated with mood stabilizers such as lithium and with atypical antipsychotics, sometimes in an urgent setting. Maintenance treatment afterward aims to prevent future episodes.
Sources
Sources and further reading
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