One out of every ten people will eventually be depressed at some time in their life and require treatment. The effect on the person and their family can be quite significant, and the cost to the economy, due to time lost from work, is astronomical. We often think of the depressed person as withdrawn, doesn't feel like going out, isolates himself, and may sleep for hours.
Depression can show up in a number of other ways as well.
People who are depressed come across as someone who is constantly angry, irate, or obsessional in thought pattern. It can show as a change in sexual energy. Depression can be expressed in other ways such as through drug use, gambling, alcohol abuse, or other addictions. The cause of depression can be explained in several ways. There has been much written in the past about the genetic component- that it is passed down through generations.