What is Chronic Fatigue Syndrome?
By Adrienne Dellwo, About.com Guide to Fibromyalgia & Chronic Fatigue
Whether you're wondering whether you have chronic fatigue syndrome (CFS or ME/CFS), have recently been diagnosed or have been living with the condition (or someone with it) for years, you'll find information here that can help you. Learn the signs and symptoms of chronic fatigue syndrome, how it's diagnosed, and how you can manage and cope with the condition.
The Basics of Chronic Fatigue Syndrome
Chronic fatigue syndrome has a lengthy list of signs and symptoms. How many one person experiences, along with how severe they are, varies greatly. Learn the basics of chronic fatigue syndrome and its symptoms, the differences between ME/CFS and fibromyalgia, other conditions people with ME/CFS often have, and common terms associated with chronic fatigue syndrome.
- Chronic Fatigue Syndrome - An Overview
- Chronic Fatigue Syndrome Symptoms - The Monster List!
- Fibromyalgia & Chronic Fatigue Syndrome: What's the Difference?
- Chronic Fatigue Syndrome & Overlapping Conditions
- Chronic Fatigue Syndrome Glossary: A-M
- Chronic Fatigue Syndrome Glossary: N-Z
Getting a Diagnosis

Chronic fatigue syndrome is a tough condition to diagnose. Find out why, what tests you can expect your doctor to order, and what the official criteria are for a diagnosis. Finding the right doctor is also important because not all health-care providers are familiar with chronic fatigue syndrome.
- Diagnosing Chronic Fatigue Syndrome
- American vs. Canadian Diagnostic Criteria
- Finding a Doctor
- Chronic Fatigue vs. Chronic Fatigue Syndrome
Coping, Support & Work Issues
Find out how you can manage your symptoms and improve your quality of life through lifestyle changes. Support is important, so be sure to check out the articles on support groups, both online and in your community. Because chronic fatigue syndrome can make it difficult for you to continue working, you'll also find an article that walks you through the process of applying for disability.
- Coping with Chronic Fatigue Syndrome - An Overview
- Find a Chronic Fatigue Syndrome Support Group
- Start Your Own Chronic Fatigue Syndrome Support Group
- Filing for Social Security Disability with Chronic Fatigue Syndrome
Causes & Risk Factors of Chronic Fatigue Syndrome
What causes chronic fatigue syndrome? Who's at risk for coming down with it? Researchers are still working to answer these questions, but we're getting clearer ideas. Find out what we know so far.
- What Causes Chronic Fatigue Syndrome?
- Genetic Predisposition
- Who's at Risk for Chronic Fatigue Syndrome?
- Why Women Are More Prone to Fibromyalgia & Chronic Fatigue Syndrome
FAQs & Fact Sheets
Get answers to frequently asked questions and learn the basic facts about chronic fatigue syndrome. Fact sheets are great when you need a refresher, need some quick information, or what to introduce someone to the topic without overwhelming them.
- Chronic Fatigue Syndrome Fact Sheet
- FAQ - Aren't People with Chronic Fatigue Syndrome "Tired" Instead of "Sick"?
- FAQ - Wouldn't Exercise Boost Energy for People with Chronic Fatigue Syndrome?
- FAQ - Are Fibromyalgia & Chronic Fatigue Syndrome the Same Thing?
- FAQ - Is Chronic Fatigue Syndrome a Psychological Condition?
- FAQ - Why Does Chronic Fatigue Syndrome Have So Many Names?
Drug & Research News

Stay on top of what advancements science is making toward better treatments and a better understanding of chronic fatigue syndrome, its causes, and possible future treatments.

