CFS Study Guide 2026
Everything you need to pass the CFS exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 CFS Exam Format at a Glance
📚 CFS Topics to Study (23)
✍️ Sample CFS Questions & Answers
1. Which type of pain is most commonly reported by CFS patients?
CFS patients frequently experience widespread muscle pain (myalgia) and joint pain (arthralgia) without swelling or redness.
2. What is the 'Millions Missing' campaign associated with ME/CFS advocacy?
The 'Millions Missing' campaign is a global advocacy campaign highlighting that millions of people with ME/CFS are effectively 'missing' from normal life — work, school, and social activities — due to their severe illness.
3. What is the 'low-dose naltrexone' (LDN) interest in the context of CFS comorbidities?
Low-dose naltrexone is used off-label for CFS and related conditions due to its potential immunomodulatory and anti-neuroinflammatory effects, though more research is needed.
4. What is the significance of the 2-day CPET (cardiopulmonary exercise test) in CFS research?
The 2-day CPET demonstrates objective evidence of PEM by showing significantly impaired aerobic capacity on the second test day compared to the first, which does not occur in healthy people.
5. What does 'post-infectious fatigue syndrome' (PIFS) describe in relation to CFS?
Post-infectious fatigue syndrome describes cases where CFS develops following an acute infection, representing a significant subset of CFS patients.
6. Why is obtaining disability accommodations challenging for many CFS patients?
The lack of widely accepted objective biomarkers for CFS, combined with physician skepticism, makes it challenging for many patients to document their disability and receive appropriate accommodations.