Overview
Myalgic encephalomyelitis/chronic fatigue syndrome is a serious, multisystem illness marked by substantial loss of function, post-exertional malaise, unrefreshing sleep, and cognitive impairment and/or orthostatic intolerance.
What current evidence indicates
- Post-exertional malaise is a defining feature: symptoms can worsen after physical, cognitive, or emotional effort, sometimes after a delay. The delay and recovery pattern are useful details to document.
- There is no single diagnostic test, approved disease-specific treatment, or established cure. Evaluation includes ruling out other causes and identifying treatable coexisting conditions.
- Management research remains limited and heterogeneous. Current care is individualized around symptom relief, activity management within limits, sleep, pain, and orthostatic symptoms; exertion should not be increased through a fixed graded schedule.
What remains uncertain
The underlying cause is not established, biomarkers are not yet adequate for routine diagnosis, and treatment trials have used differing case definitions. Claims of universal cures are not supported.
Useful details for a clinical visit
- Changes in function compared with before illness
- Timing and duration of post-exertional worsening
- Sleep quality, cognitive symptoms, and upright intolerance
Primary and authoritative sources
This summary provides general education and cannot determine whether you have this condition or which treatment is appropriate. Discuss symptoms, testing, and treatment decisions with a qualified clinician.
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