| | Mental Health | Bipolar Disorder How is bipolar disorder spread? Bipolar disorder is not spread. It is a chronic mental illness that is caused by a complex combination of genetic, environmental, and neurobiological factors. Bipolar Disorder - Related Articles Tips on Living With a Bipolar Spouse How is bipolar disorder spread? Is there another term for bipolar? How to Find a Bipolar Treatment Center How to Treat Bipolar Naturally Bipolar Disorder Symptoms Bipolar in Young Children