Although fully 20% of any doctor’s patients report being tired or fatigued, actual cases of chronic fatigue syndrome are (fortunately) rather uncommon. Yet it’s also a condition that, like fibromyalgia, is markedly complex and about which doctors disagree. CFS (also called CFIDS, for Chronic Fatigue Immune Dysfunction Syndrome) first came to prominence in the 1980s when young people, after suffering cases of really awful flu, simply couldn’t get their energy back to normal again. And even though they seemed to have symptoms of a lingering virus (muscle aches, headaches, swollen lymph glands, sore throats), no virus wa