FAQs
What are the main causes of bipolar disorder?
Bipolar disorder is caused by a complex combination of genetic factors, brain chemistry imbalances, hormonal fluctuations, stressful life events, and certain health conditions or substance use.
Is bipolar disorder hereditary?
Yes, genetics play a significant role—having a first-degree relative with bipolar disorder increases a person’s lifetime risk from about 1-2% to roughly 10-15%, with heritability estimates up to 80% according to twin studies.
Can stress trigger bipolar episodes?
Stress alone rarely causes bipolar disorder but can trigger manic or depressive episodes in individuals who have a genetic vulnerability to the condition.
Which brain chemicals are involved in bipolar disorder?
Neurotransmitters such as dopamine, serotonin, and norepinephrine regulate mood and are often imbalanced in bipolar disorder, contributing to manic and depressive symptoms.
Are hormonal changes linked to bipolar disorder?
Yes, cortisol (stress hormone), thyroid hormone irregularities, and estrogen fluctuations—especially in women—can influence the onset and severity of bipolar mood episodes.
