Fibromyalgia (FM), among other chronic pain syndromes, such as chronic tension type
headache and atypical face pain, is classified as a so-called dysfunctional pain syndrome.
Patients with fibromyalgia suffer from widespread,“deep” muscle pain and often report
concomitant depressive episodes, fatigue and cognitive deficits. Clear evidence for
structural abnormalities within the muscles or soft tissue of fibromyalgia patients is lacking.
There is growing evidence that clinical pain in fibromyalgia has to be understood in terms of …