There isn’t a single or exact known cause of bipolar disorder. However, research has identified several suspected causes and risk factors that help explain why someone may develop bipolar disorder. These include genetics or family history of bipolar disorder, environmental factors, and brain structural and functioning differences.
This article details the suspected causes of bipolar disorder, risk factors to be aware of, and known brain differences. It also covers what causes worsening symptoms in people with bipolar disorder and other variables that can cause complications. Read more in Verywell.