Generally, most of the people experience a normal condition of fear prior to confrontation things like examination, test, interview or recital.

The conditions which are nowadays regarded as anxiety disorders came into existence with the invention of psychiatry ages by the end of nineteenth century. Gelder, Geddes and Mayou describes that the anxiety disorders are divided into two groups named as episodic symptoms and continuous symptoms. The latest psychiatric diagnostic criterion identifies large varieties of anxiety disorders. It has been found by several surveys that nearly 18% of the Americans are affected any of the two anxiety disorders.

Some of the common types of anxiety disorder are phobic disorder, generalized anxiety disorder, panic disorder. Each of them has their own symptoms and characteristics and demands a different type of treatment. Anxiety covers four different aspects of experiences that a person can have: physical tension, mental apprehension, dissociative anxiety and physical signs and symptoms. The emotions in anxiety disorders include simple nervousness to traits of terror.

It is regarded as a common symptom of medical and substance abuse issue and professionals should be cautious about this. An analysis of generalized anxiety disorder starts when the person is worried about a specific health problem since six months. A person suffering from this type of anxiety disorder might suffer from problems in making regular decisions and in remembering commitments as an effect of shortage of concentration due to worry.