Depression is another disorder. Bipolar Disorder is an illness in which the person has very severe mood swings. It is sometimes referred to as manic-depressive illness. However, the mood swings back at some point to a very low mood or to depression. Sometimes the person will have a normal mood in between the mood swings.
Depression is a very low mood.
Anxiety is the feeling of dread, fear, or tension which comes when you are unable to put your finger on what is the problem. It causes a physical reaction. Anxiety comes in many shapes and forms, and it is a problem for both mentally ill and non-mentally ill people alike. We may not be able to be completely free from anxiety, but we do our best to reduce anxiety and cope with it in health ways. Paranoia is an extreme or unreasonable degree of suspiciousness.