... run in families and appears to have a genetic link. Bipolar disorder is different from any other form of depression. People who suffer from this disease experience "highs" and "lows." That is why it is called bipolar disorder. It affects both poles. The most common symtoms of mania - the "highs" - are increased physical and mental activity and energy, heightened mood and self-confidence ... , excessive irratability, decreased need for sleep without experiencing fatigue, delusions and racing speech and thoughts. Symptoms for depression - the "lows" - are prolonged sadness, unexplained cry...

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