Generalized Anxiety Disorder is characterized by excessive anxiety and worry about a number of events or activities (such as work or school performance). The anxiety and worry are associated with at least three of these symptoms:

1. Restlessness or feeling keyed up or on edge
2. Being easily fatigued
3. Difficulty concentrating or mind going blank
4. Irritability
5. Muscle tension
6. Sleep disturbance (difficulty falling or staying asleep, or restless unsatisfying sleep)

These symptoms must cause a high level of distress or impairment in functioning (social, occupational, or other important areas).