Everybody knows what it's like to feel anxious -- the butterflies in your stomach before a first date, the tension you feel when your boss is angry, and the way your heart pounds if you're in danger. Anxiety rouses you to action. It gears you up to face a threatening situation. It makes you study harder for that exam, and keeps you on your toes when you're making a speech. In general, it helps you cope.

But if you have an anxiety disorder , this normally helpful emotion can do just the opposite -- it can keep you from coping and can disrupt your daily life. There are several types of anxiety disorders, each with their own distinct features.

An anxiety disorder may make you feel anxious most of the time, without any apparent reason. Or the anxious feelings may be so uncomfortable that to avoid them you may stop some everyday activities. Or you may have occasional bouts of anxiety so intense they terrify and immobilize you.

Anxiety disorders are the most common of all the mental health disorders. Considered in the category of anxiety disorders are: Generalized Anxiety Disorder, Panic Disorder, Agoraphobia, Social Phobia, Obsessive Compulsive Disorder, Specific Phobia, Post-Traumatic Stress Disorder, and Acute Stress Disorder. Anxiety disorders as a whole cost the United States between 42-46 billion dollars a year in direct and indirect healthcare costs, which is a third of th...