my experience is that chronic hypoglycemia is a very common cause of fatigue in CFS sufferers," writes Dr. Sarah Myhill, MD, a UK-based CFS specialist focused on nutrition, preventive medicine, and patient education. This article is excerpted from Dr. Myhill’s book – Diagnosing and Treating Chronic Fatigue Syndrome – available in pdf format at her website (DrMyhill.co.uk).* It reflects her experience treating more than 4,000 patients with CFS over the past 20 years - many of whom also have Fibromyalgia.