Chronic Fatigue Syndrome

What Is ME/CFS?

Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a complex, chronic illness characterized by profound fatigue that is not improved by rest and worsens with activity. It often includes widespread pain, cognitive difficulties, and other symptoms. It affects an estimated 1-2.5 million Americans and can be severely disabling.¹

Core Symptoms²

Required for Diagnosis

• Substantial reduction in activity lasting 6+ months
• Profound fatigue not relieved by rest
• Post-exertional malaise (PEM)
• Unrefreshing sleep

Plus One or Both

• Cognitive impairment ("brain fog")
• Orthostatic intolerance (symptoms worse when upright)

Post-Exertional Malaise (PEM)

• Hallmark symptom of ME/CFS
• Symptom worsening after physical/mental activity
• May be delayed 24-72 hours
• Can last days to weeks
• Distinguishes from other fatigue

Other Common Symptoms

• Muscle pain
• Joint pain (without swelling)
• Headaches
• Sore throat
• Tender lymph nodes
• Sensitivities (light, sound, foods)
• Temperature dysregulation

Diagnosis Challenges³

• No specific diagnostic test
• Diagnosis of exclusion
• Often takes years to diagnose
• Frequently misunderstood
• Many doctors unfamiliar with condition

Management Approaches

Pacing

• Activity management essential
• Stay within "energy envelope"
• Avoid boom-bust cycle
• Rest before exhaustion

Sleep

• Sleep hygiene important
• May need medication for sleep
• Even with sleep, still unrefreshed

Pain Management

• Similar to fibromyalgia approaches
• Low-dose medications
• Gentle therapies

Orthostatic Intolerance

• Increased fluid and salt (if appropriate)
• Compression garments
• Medications if needed

Important Cautions

• Graded exercise therapy may harm some patients
• Pushing through can worsen condition
• Rest is not laziness
• Condition is biological, not psychological

Living with ME/CFS

• Pacing is fundamental
• Adjust expectations
• Connect with support groups
• Advocate for yourself
• Consider disability if needed

References

1. Institute of Medicine. Beyond myalgic encephalomyelitis/chronic fatigue syndrome: redefining an illness. Washington, DC: National Academies Press; 2015.
2. Carruthers BM, van de Sande MI, De Meirleir KL, et al. Myalgic encephalomyelitis: International Consensus Criteria. J Intern Med. 2011;270(4):327-338.
3. Bateman L, Bested AC, Bonilla HF, et al. Myalgic encephalomyelitis/chronic fatigue syndrome: essentials of diagnosis and management. Mayo Clin Proc. 2021;96(11):2861-2878.