Core diagnostic criteria that must be present for >= 3 months:
(1) >= 6 out of 9 pain sites (multisite pain)
(2) at least one of the following
(2a) fatigue
(2b) moderate to severe sleep problems
Sites:
(1) head
(2) left arm
(3) right arm
(4) chest
(5) abdomen
(6) upper back and spine
(7) lower back, spine and buttocks
(8) left leg
(9) right leg
Common features supportive of the diagnosis:
(1) tenderness of soft tissue and muscles to pressure
(2) dyscognition (difficulty concentrating, slow thinking, forgetfulness, etc)
(3) musculoskeletal stiffness
(4) sensitivity to environmental factors (bright lights, noise, perfumes, cold, etc)
