Abstract
The development of standardised criteria for the diagnosis of fibromyalgia in 1990 has allowed careful study of this chronically painful syndrome. Epidemiological studies show increased symptoms and disability in patients with fibromyalgia, compared with other conditions associated with chronic, widespread pain. In addition, prevalence and severity of fibromyalgia symptoms are increased in women. Current studies have identified strong evidence for central sensitisation in fibromyalgia. Data from these studies may expand effective treatment options for fibromyalgia.