This article clearly outlines the sign and symptoms of depression, and various types of depression

The Effects of Depression Rachel Jones (I decided to write on depression, because I recently found out that I suffer from anxiety attacks. A major cause of mental health disorders such as depression and anxiety in individuals is stress. Anxiety disorders are sometimes confused with having a heart-attack; some symptoms are, pounding heart, or fast heart rate, sweating, trembling, or shaking, feeling as though you are choking, chest discomfort, dizzy, light-headed, nausea, stomach pain, fear …

…admit or think. Many of us experience depression because of certain misfortunate situations that occur in day to day living. The next time when you are depressed about a particular misfortune that it's okay to cry, be sad or angry. But, after a given amount of time, you are expected to stop crying, be happy and less angry before becoming depressed. Journal of Health and Social Behavior, http://www.hoptechno.com/book34.htm Zoloft.com