Fibrofog mimics 20 years of aging
An article has been published recently suggesting that the cognitive problems associated with Fibrofog mimic around 20 years of aging. 
The article, Fibromyalgia and cognition, by JM Glass, was published in the Journal of clinical psychiatry.
Cognitive difficulties are a common symptom of Fibromyalgia Syndrome (Fibro), including problems with memory and difficulty concentrating. These cognitive difficulties are often nicknamed "Fibrofog". The existence of these symptoms has been confirmed, according to the article, by studies that were looking at the incidence of cognitive problems in Fibro patients. These studies included objective tests of metamemory (knowing about your own memories, such as how accurate they are), working (short-term) memory, semantic memory (such as remembering facts and the meanings of words), everyday attention, task switching (i.e. being able to change from one task to another), and selective attention (when you purposely focus on one thing). The studies show that the problems with working (short-term) memory, episodic (relating to a specific event) memory and semantic memory associated with Fibro mimic the effects of around 20 years of aging. 
According to the article, the cognitive difficulties associated with Fibro may be exacerbated by the presence of depression, anxiety, sleep problems, endocrine disturbances, and pain, but the relationship of these factors to the cognitive difficulties is unclear. 
Glass notes that standardised tests and treatment have not yet been established for the cognitive difficulties associated with Fibro.  These cognitive difficulties can be extremely hard for patients to cope with and they can have a significant impact on Fibro patients' ability to function and especially to continue working. Proving the cognitive difficulties is often complicated and this can cause issues with family and carers, employers and benefits agencies. Standardised testing for these cognitive problems would be useful and could provide validation for patients. Having accepted treatment protocols for "Fibrofog" would likely make a huge difference to the impact Fibro can have on patients' lives.
- Glass JM. Fibromyalgia and cognition. J Clin Psychiatry. 2008;69 Suppl 2:20-4.