There are many signs of bipolar disorder. Some are more obvious than others, but all will give you clues and help you determine if you or someone you know may have bipolar disorder.   Those who are suffering from bipolar disorder may exhibit the following:   1. Tend to be in a good mood much of the time and appear euphoric and full of energy. This doesn't mean that they don't get sad or depressed – it just means that they spend more time feeling good than they do feeling bad. 2. Talking excessively and talking very fast or very slow. 3. Depressive episodes. 4. Changes in sleeping patterns. 5. Racing thoughts. They may jump from one topic to the next without waiting for you to respond. 6. Increased energy. 7. Impulsiveness.