Causes

Like many other mental health conditions, social anxiety disorder likely arises from a complex interaction of biological and environmental factors. Possible causes include:

• Inherited traits. Anxiety disorders tend to run in families. However, it isn't entirely clear how much of this may be due to genetics and how much is due to learned behavior.
• Brain structure. A structure in the brain called the amygdala (uh-MIG-duh-luh) may play a role in controlling the fear response. People who have an overactive amygdala may have a heightened fear response, causing increased anxiety in social situations.
• Environment. Social anxiety disorder may be a learned behavior — some people may develop significant anxiety after an unpleasant or embarrassing social situation. Also, there may be an association between social anxiety disorder and parents who either model anxious behavior in social situations or are more controlling or overprotective of their children.