Explaining “Unexplained Illnesses” provides long-sought explanations for the properties of chronic fatigue syndrome (CFS), multiple chemical sensitivity (MCS), fibromyalgia (FM), and post-traumatic stress disorder (PTSD). This groundbreaking book examines common symptoms and signs; short-term stressors such as infection, chemical exposure, physical trauma, and severe psychological stress; why people are often diagnosed as having more than one of these illnesses; and approaches for treating the cause of each disease, rather than the symptoms. The book presents a detailed and well-supported mechanism (the NO/ONOO- cycle) that provides consistent explanations for many of the puzzling elements of these diseases.