Chapter 1 is entitled The "F Word" in Medicine: Or Why Fibromyalgia is Not That Legit." Check out the introduction in episode 2 if you want more context. In chapter 1, we discuss the limitations of a fibromyalgia diagnosis in a rational diagnostic approach to illness, particularly mold disease. A patient with chronic fatigue and a constellation of other symptoms that defy conventional understanding will sooner or later be put into this category. Understanding CIRS requires first understanding what it is not; not fibromyalgia.