There are some key symptoms that may suggest you have bipolar disorder. Mania is a key indicator of bipolar disorder. Mania is a state of abnormally elevated mood, energy and activity that lasts for at least one week or longer. Symptoms of mania can include: feeling very happy or silly for no reason; being extremely irritable; having lots of energy; talking very quickly; being restless and unable to stay still; sleeping less than usual; and doing risky things, such as spending too much money or driving too fast. Other symptoms of bipolar disorder include depressive episodes, which feature feelings of sadness, emptiness, and hopelessness that can last two weeks or longer. If you have bipolar disorder, you may experience periods of both mania and depression, or you may only have one or the other. Bipolar disorder can cause problems with work, school, and relationships. It can be hard to function when your mood swings from extremely happy to very depressed. Bipolar disorder usually starts in adolescence or early adulthood, but it can occur in children as well. If you think you might have bipolar disorder, it’s important to see a mental health professional for an evaluation. Bipolar disorder is a treatable condition, and with proper treatment, most people with bipolar disorder can live healthy and productive lives.