The
generalized anxiety disorder (GAD) which is characterized by a permanent state
of anxiety. People who have this disorder feel afraid of something but are
unable to express specifically what they fear. Because of muscle tension and
hyperactivity of the autonomic nervous system, anxiety can develop headaches,
palpitations, dizziness and insomnia. These symptoms, combined with the
psychological aspects associated with anxiety, cause difficulties in dealing
with normal daily activities.
The Vital Needs Theory - page 38