
Anxiety is associated with uneasiness, fearfulness, and tension. Mild anxiety, for example, associated with exams or interview, is normal and triggers 'fight or flight' response. Anxiety without an identifiable cause, anxiety which persists even after the stressful condition is over, and anxiety which is out of proportion of the stressful condition indicates abnormal anxiety. However, severe and persistent anxiety can interfere with everyday activities and might lead to other psychic problems. Anxiety disorder is a mental health disorder characterized by the presence of anxiety. These disorders might occur simultaneously with other disorders such as depression, or along with drug abuse.