Between the beginning of the century and the early 1980's the syndrome was termed
incorrectly fibrocitis, which means connective tissue inflammation. The name was
changed as we learned that, in fact, inflammation is not part of the equation, but
myalgia (pain) is. It was in 1990 that the American College of Rheumatolgy (ACR)
established classification criteria so that the syndrome can now be diagnosed, which
has brought considerable relief to the estimated three percent of the population that
suffers from it.