Bipolar disorders and anxiety are frequent bedfellows. In fact, anxiety and anxiety disorders occur in more than half of those with bipolar type I, according to the paper, "The Importance of Anxiety States in Bipolar Disorder." And I am one of those who experience anxiety in bipolar disorder. Whether your anxiety comes in the form of a specific disorder, or it's just symptoms of anxiety, I can attest to the fact that anxiety affects bipolar disorder, and it's not in good ways.