It is common to hear that there are complex diseases, although the complexity lies in the lack of knowledge of the mechanisms that cause them. When we get to know the mechanism better, these diseases are no longer considered complex.1
However, when there is widespread pain, fatigue, sleep disturbances and many other symptoms shared by people with fibromyalgia, there is another common manifestation, fear, or rather, the various fears that appear while searching for explanations.2