A permanent state of worry and nervousness often accompanied with physiological concomitants include increased heart rate, altered respiration rate, sweating, trembling, weakness, and fatigue; psychological concomitants include feelings of impending danger, powerlessness, apprehension, and tension.

Anxiety is a normal reaction to stress. It helps one deal with a tense situation in the office, examination, etc. But when anxiety becomes an excessive, irrational dread of everyday situations, it has become a disabling disorder.