Anxiety Disorders Are a Category of Mental Disorders Characterized by Feelings of Anxiety and Fear, Where Anxiety is a Worry About Future Events and Fear is a Reaction to Current Events. These Feelings May Cause Physical Symptoms, Such as a Racing Heart and Shakiness. There Are a Number of Anxiety Disorders: Including Generalized Anxiety Disorder, a Specific Phobia, Social Anxiety Disorder, Separation Anxiety Disorder, Agoraphobia, and Panic Disorder Among Others.