Anxiety disorders run in families.  For example, if one identical twin has an anxiety disorder, the second twin is likely to have an anxiety disorder as well, which suggests that genetics - possibly in combination with life experiences - makes some people more susceptible to these illnesses.  Brain chemistry, too, appears to play a role in the onset of anxiety disorders, since symptoms of anxiety disorders are often relieved by medications that alter levels of chemicals in the brain.  Personality also may play a role, as people who have low self-esteem and poor coping skills may be prone to anxiety disorders. Finally, life experiences such as long-term exposure to abuse, violence, or poverty may affect individuals' susceptibility to these illnesses.

Treatment