How to tell the difference between Chronic Fatigue Syndrome (CFS) and general chronic fatigue?

A key symptom of CFS, which is absent in 'ordinary' fatigue, is post-exertional malaise (PEM): a significant worsening of symptoms after minimal physical or mental exertion, which lasts 24 hours or more. With ordinary chronic fatigue, activity can be tiring, but it does not cause such a 'crash' the next day.

Is Chronic Fatigue Syndrome curable?

Currently, there is no specific treatment. Some patients (~5–10%) recover completely; most find a stable state with proper energy management (pacing). Some improvements are seen with: pacing, symptom management, and, if necessary, medication for individual symptoms (sleep, pain). Important: intensive exercise (GET) for CFS is contraindicated, despite outdated recommendations.

Chronic Fatigue Syndrome (CFS/ME): Symptoms, Diagnosis, Living With It

Chronic Fatigue Syndrome (CFS) is not "just being tired." It's a neurological disorder where any activity can worsen symptoms. Here's what is known about it and how people live with it.

🌿psybot.app·June 19, 2026·2 min read

«I'm 32 years old, and I can't walk more than 200 meters without spending several days in bed afterward.» «I get out of bed, and by lunchtime, I can't think anymore.» «All my tests are normal. Doctors say I'm healthy. But I'm not healthy.»

This is CFS — Chronic Fatigue Syndrome. Or its more precise name: ME — Myalgic Encephalomyelitis.

1. What is CFS/ME

CFS/ME is a systemic neurological disorder recognized by the WHO. It is not "psychosomatic" or "imagined" — biological markers are found in it: neuroinflammation, immune dysfunction, mitochondrial dysfunction, and brain changes.

2. Diagnostic Criteria (ICC, 2011)

Post-exertional malaise (PEM) — key symptom: significant worsening after minimal exertion, lasting 24+ hours
Unrefreshing sleep (you sleep, but don't rest)
Cognitive impairment ("brain fog": difficulties with concentration, memory, word-finding)
Symptoms of orthostatic intolerance (worsening when standing)
Duration: 6 months or more

3. Post-COVID CFS

COVID-19 has significantly raised awareness of CFS: post-COVID fatigue in some patients meets the criteria for CFS/ME. Estimates vary, but millions of people worldwide are affected. Post-COVID CFS is the same illness, triggered by a viral agent.

4. Pacing: The Main Management Tool

Pacing is managing your energy "envelope": not spending more than you have. Key principles:

Do not exceed your individual "anaerobic threshold" of activity
Plan rest before fatigue, not after
Keep an activity and symptom diary
Say "no" to any exertion beyond your capacity

Important: strenuous physical exercise (GET — graded exercise therapy) is contraindicated in CFS/ME — it worsens the condition.

5. Psychological Support for CFS

CFS is associated with a heavy emotional burden: job loss, isolation, lack of understanding from others. Psychological support is important — not for "treating" CFS, but for working through grief, adaptation, and quality of life.

Talk to our AI psychologist psybot.app. See also: Chronic Fatigue.

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