The syndrome of fibromyalgia includes an unusually large and heterogen
eous number of symptoms apart from the core features of generalized pa
in and widespread tenderness. Widespread tenderness is the only object
ive criterion. There is no evidence that fibromyalgia is a disease of
the muscles or a rheumatic syndrome. The experience from an Australian
epidemic of fibromyalgia indicates that there is an important psychos
omatic component in the pathogenesis. Probably, fibromyalgia is not a
disease entity; rather, the symptoms reflect difficulties in coping wi
th various types of environmental stress. Secondary to this, sleep dis
turbances, fatigue, a low level of physical activity and poor physical
fitness may develop, rendering the patients susceptible to muscle pai
n and tenderness elicited by sleep disturbances. A vicious circle may
be responsible for the chronicity of the syndrome. Identification of e
nvironmental factors and early intervention should be given a high pri
ority.