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ME/CFS – Causes, Symptoms and Treatment
ME/CFS is a severe chronic illness causing extreme fatigue, cognitive impairment, and post-exertional malaise that significantly reduces quality of life.
Things worth knowing about "ME/CFS"
ME/CFS is a severe chronic illness causing extreme fatigue, cognitive impairment, and post-exertional malaise that significantly reduces quality of life.
What is ME/CFS?
ME/CFS stands for Myalgic Encephalomyelitis / Chronic Fatigue Syndrome. It is a serious, chronic, and complex multi-system disease affecting the nervous system, immune system, and energy metabolism. People with ME/CFS experience an overwhelming, unrefreshing fatigue that is not relieved by sleep or rest. For many years, the condition was misunderstood or dismissed. Today, ME/CFS is classified by the World Health Organization (WHO) as a neurological disorder.
Causes
The exact causes of ME/CFS are not yet fully understood. Common triggers include:
- Viral or bacterial infections: ME/CFS frequently begins after an infection, such as Epstein-Barr virus, enteroviruses, or – increasingly recognized – SARS-CoV-2 (Long COVID-associated ME/CFS).
- Immune dysregulation: Chronic low-grade inflammation and possible autoimmune processes are under investigation.
- Mitochondrial dysfunction: Impaired cellular energy production is thought to play a central role.
- Autonomic nervous system dysregulation: Many patients show signs of orthostatic intolerance and altered heart rate variability.
Symptoms
The hallmark symptom of ME/CFS is Post-Exertional Malaise (PEM) – a worsening of all symptoms following physical or mental exertion that can last for hours or days. Other common symptoms include:
- Extreme, persistent fatigue not relieved by sleep
- Cognitive impairment (often called brain fog): difficulty concentrating and memory problems
- Unrefreshing sleep
- Orthostatic intolerance (dizziness or fainting when standing up)
- Muscle and joint pain
- Headaches
- Swollen lymph nodes and sore throat
- Hypersensitivity to light, noise, or smell
Diagnosis
There is currently no specific blood test or biomarker for ME/CFS. Diagnosis is made clinically using established diagnostic criteria:
- Canadian Consensus Criteria (CCC, 2003)
- International Consensus Criteria (ICC, 2011)
- IOM Criteria (2015): Systemic Exertion Intolerance Disease (SEID)
Other conditions must be excluded before a diagnosis is made (e.g., thyroid disorders, depression, sleep apnea). Symptoms must be present for at least 6 months and cause significant functional impairment.
Treatment
There is currently no curative treatment for ME/CFS. Management focuses on symptom relief and includes:
Pacing and Energy Management
Pacing is the most important strategy: patients learn to manage their activities within their personal energy limits to avoid triggering PEM episodes. Graded Exercise Therapy (GET) is no longer recommended by most ME/CFS specialists, as it can worsen symptoms.
Symptomatic Treatment
- Management of sleep disturbances
- Pain management (e.g., low-dose analgesics or anti-inflammatories)
- Treatment of orthostatic intolerance (e.g., increased salt and fluid intake, compression stockings)
- Support for cognitive symptoms related to brain fog
Psychosocial Support
Because ME/CFS often leads to social isolation and emotional distress, psychosocial support is an important part of care. Cognitive Behavioral Therapy (CBT) may be used as a coping tool – but not as a cure or primary treatment for the underlying condition.
Severity Levels
ME/CFS is categorized into different levels of severity:
- Mild: Reduced activity levels, but may still work part-time
- Moderate: Significantly reduced mobility, often housebound
- Severe: Largely bedridden, requiring substantial care
- Very Severe: Fully bedridden, dependent on intensive care support
ME/CFS and Long COVID
Awareness of ME/CFS has grown substantially since the COVID-19 pandemic. A significant proportion of individuals with Long COVID meet the diagnostic criteria for ME/CFS. This has greatly accelerated global research efforts and provided new insights into the pathophysiology of both conditions.
References
- World Health Organization (WHO): International Classification of Diseases (ICD-11) – G93.3 Postviral fatigue syndrome. Geneva, 2022.
- National Academies of Sciences, Engineering, and Medicine: Beyond Myalgic Encephalomyelitis/Chronic Fatigue Syndrome – Redefining an Illness. Washington D.C.: The National Academies Press, 2015.
- Komaroff AL, Lipkin WI: Insights from myalgic encephalomyelitis/chronic fatigue syndrome may help unravel the pathogenesis of post-acute COVID-19 syndrome. Trends in Molecular Medicine, 2021.
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