The most common anxiety attacks are Generalized Anxiety Disorder, Panic Disorder, Phobic Disorders, Obsessive-compulsive Disorder and Stress-related Disorders. Generalized Anxiety Attacks Generalized Anxiety Disorders (GAD) is characterized by anxiety symptoms that are present for much of the time and not restricted to specific situations. Generalized anxiety often accompanies phobias and is extremely common in people who are depressed. It can also be caused by physical illness, such as an .