According to the National Institute of Mental Health, about 21.4 percent of Americans have a mood disorder at some time in their lives. Sadly, stigmas still exist about mental health issues. This keeps some from seeking help. Here’s a guide to the most common mood disorders. What is a mood disorder? A mood disorder is a mental health grouping doctors use to describe all kinds of depression and bipolar disorders. If you have one, your emotional state is distorted, or not what others might think it should be, based on what is going on in your life. This impedes your ability to act as you should