What causes bipolar disorder?

What causes bipolar disorder?

Scientists don’t yet know the exact cause of bipolar disorder.

But they do believe there’s a strong genetic (inherited) component. Bipolar disorder is considered one of the most heritable psychiatric conditions — more than two-thirds of people with bipolar disorder have at least one close biological relative with the condition. However, just because you have a biological relative with bipolar disorder, doesn’t necessarily mean you’ll also develop it.

Other factors that scientists think contribute to the development of bipolar disorder include:

• Changes in your brain: Researchers have identified subtle differences in the average size or activation of some brain structures in people with bipolar disorder. However, brain scans can’t diagnose the condition.
• Environmental factors like trauma and stress: A stressful event, such as the death of a loved one, a serious illness, divorce or financial problems can trigger a manic or depressive episode. Because of this, stress and trauma may also play a role in the development of bipolar disorder.

Scientists are currently performing research to determine the relationship that these factors have in bipolar disorder, how they may help prevent its onset and what role they may play in its treatment.