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Bipolar disorder, also known as manic depressive illness, is a brain disorder that causes unusual shifts in a person's mood, energy, and ability to function. Different from the normal ups and downs that everyone goes through, the symptoms of bipolar disorder are severe. They can result in damaged relationships, poor job or school performance, and even suicide. But there is good news: bipolar disorder can be treated, and people with this illness can lead full and productive lives.

About 5.8 million American adults or about 2.7 percent of the population age 18 and older in any given year, have bipolar disorder. Bipolar disorder typically develops in late adolescence or early adulthood. However, some people have their first symptoms during childhood, and some develop them late in life. It is often not recognized as an illness, and people may suffer for years before it is properly diagnosed and treated. Like diabetes or heart disease, bipolar disorder is a long-term illness that must be carefully managed throughout a person's life.

What Are the Symptoms of Bipolar Disorder?

Bipolar disorder causes dramatic mood swingsfrom overly "high" and / or irritable to sad and hopeless, and then back again, often with periods of normal mood in between. Severe changes in energy and behavior go along with these changes in mood. The periods of highs and lows are called episodes of mania and depression.

Signs and symptoms of mania (or a manic episode) include:

Increased energy, activity, and restlessness
Excessively "high," overly good, euphoric mood
Extreme irritability
Racing thoughts and talking very fast, jumping from one idea to another
Distractibility, can't concentrate well
Little sleep needed
Unrealistic beliefs in one's abilities and powers
Poor judgment
Spending sprees
A lasting period of behavior that is different from usual
Increased sexual drive
Abuse of drugs, particularly cocaine, alcohol, and sleeping medications
Provocative, intrusive, or aggressive behavior
Denial that anything is wrong

A manic episode is diagnosed if elevated mood occurs with three or more of the other symptoms most of the day, nearly every day, for 1 week or longer. If the mood is irritable, four additional symptoms must be present.

Signs and symptoms of depression (or a depressive episode) include:

Lasting sad, anxious, or empty mood
Feelings of hopelessness or pessimism
Feelings of guilt, worthlessness, or helplessness
Loss of interest or pleasure in activities once enjoyed, including sex
Decreased energy, a feeling

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