Mania is the signature characteristic of bipolar disorder and, depending on its severity, is how the disorder is classified. Mania is generally characterized by a distinct period of an elevated mood, which can take the form of euphoria. People in Manic Episode exhibit folowing behavior:

Lack of Desire to Sleep

People commonly experience an increase in energy and a decreased need for sleep, with many often getting as little as 3 or 4 hours of sleep per night, while others can go days without sleeping.

Pressured Speech

A person may exhibit pressured speech, with thoughts experienced as racing. Attention span is low, and a person in a manic state may be easily distracted.

Impaired Judgement

Judgment may become impaired, and sufferers may go on spending sprees or engage in behavior that is quite abnormal for them.

Substance Abuse

They may indulge in substance abuse, particularly alcohol or other depressants, cocaine or other stimulants, or sleeping pills.

Unexplained Behavior

Their behavior may become aggressive, intolerant, or intrusive. People may feel out of control or unstoppable, or as if they have been "chosen" and are "on a special mission" or have other grandiose or delusional ideas. Sexual drive may increase.

Diagnosis

To be diagnosed with mania according to the Diagnostic and Statistical Manual of Mental Disorders (DSM), a person must experience this state of elevated or irritable mood, as well as other symptoms, for at least one week, less if hospitalization is required.