What are the most common causes of generalized anxiety disorder?

What are the most common causes of generalized anxiety disorder?

Christopher Reist (Academic Psychiatrist, Co-Author of “Psychiatry”) gives expert video advice on: What are the common treatments for generalized anxiety disorder?; Is there anything I can do to avoid developing generalized anxiety disorder? and more...

The causes of generalised anxiety disorder are really not known; it's not genetic. Physiology explains that the brain's adrenaline is involved.