Do all fibromyalgia patients have the same symptoms?
No. There is a high degree of variability in the presentation of fibromyalgia. Subgroups of the syndrome have been identified based on the number of active tender points, sleep quality, and cold pain threshold. These subgroups have different prognoses. Patients may also be grouped according to related disease. Of patients with irritable bowel syndrome (IBS), 20% demonstrate findings consistent with fibromyalgia. Fibromyalgia is more common in diabetics than in the general population, and the severity of pain correlates with the duration of diabetes. These may constitute additional subgroups of fibromyalgia. Fibromyalgia is also common in autoimmune diseases, such as Sjögren’s Syndrome, systemic lupus erythematosus, Hashimoto’s thyroiditis, and rheumatoid arthritis.