Chronic fatigue syndrome (Myalgic Encephalomyelitis)
Myalgic encephalomyelitis (ME), commonly referred to as chronic fatigue syndrome (CFS), is a long-lasting and intricate disorder marked by profound weariness and disproportionate exhaustion. It impacts multiple organ systems, including the brain, muscular system, gastrointestinal tract, immune function, and cardiovascular system. ME/CFS is acknowledged as a serious, acquired condition and is classified as a neurological disorder. The term “myalgic encephalomyelitis” literally denotes muscle pain and inflammation of the brain and spinal cord. Researchers have begun to identify certain biological alterations in individuals with ME/CFS, although they have not yet determined how to prevent or cure the condition. It is estimated that up to 250,000 Australians live with this syndrome, with approximately 75–80 percent of those affected being female.
Primary Features of ME/CFS
The signature symptom of ME/CFS is post-exertional malaise (PEM). In this context, PEM refers to a noticeable worsening of symptoms following minimal physical or mental activity, tasks that would not have posed a problem prior to illness onset. The repercussions of activity can be delayed by as much as 24 to 48 hours, making it difficult for individuals to recognize their limits. The intensity of PEM varies between patients and correlates with the severity of their illness. Episodes may last from one day to several days, and in severe cases, a significant relapse can continue for weeks or even months. About 25 percent of people with ME/CFS experience symptoms so debilitating that they cannot leave their home or even their bed.
Other manifestations may include:4,5
- Cognitive dysfunction (e.g. difficulties with thinking, poor concentration, or memory loss)
- Disturbed sleep patterns
- Headaches, dizziness, or lightheadedness
- Muscle and joint aches
- Sore throat, tender lymph nodes, and flu-like sensations
- Gastrointestinal disturbances, such as nausea, constipation, or diarrhea
- Blood pressure fluctuations or heart palpitations
- Shortness of breath with exertion or when standing
- Sensitivities to light, noise, food, medications, or chemicals
- Difficulty managing temperature changes
Some individuals notice a sudden onset of ME/CFS, whereas others observe a gradual development over months or even years.
Underlying Contributors to ME/CFS
The precise cause of ME/CFS remains unknown. However, the disorder frequently emerges following an acute infection, such as influenza, an upper respiratory infection, or glandular fever. Exposure to pesticides, heavy metals, and environmental pollution may also trigger the condition. Additional factors that could contribute include:
- Physical trauma, such as surgery or an accident
- Physical, psychological, or emotional stress
- Genetic predisposition
Identifying ME/CFS
No single laboratory test can definitively diagnose ME/CFS; instead, physicians perform various investigations to exclude other potential causes of the symptoms. To receive an official diagnosis, a patient must exhibit all three of the following core criteria:
- A substantial decline in previous levels of activity and profound fatigue lasting at least six months, not caused by significant exertion and not relieved by rest
- Post-exertional malaise
- Unrefreshing sleep
In addition, the patient must present with at least one of these:
- Cognitive impairment (e.g. problems with memory, concentration, or comprehension)
- Orthostatic intolerance (e.g. palpitations, sweating, dizziness, or nausea upon standing, which improve when lying down)
Managing and Treating ME/CFS
Most people with ME/CFS do not fully recover; fewer than 10 percent regain their pre-illness level of functioning. Current treatment focuses on symptom management and enhancing quality of life. There are two main approaches:
- Pacing and Rest: Learning to balance activity and rest to avoid exacerbating symptoms. This typically involves breaking tasks into short intervals interspersed with rest periods, conserving energy for later in the day.
- Stepwise Symptom Management: Developing strategies to address and reduce the most impactful symptoms first, then progressively tackling additional issues.
Collaborating with a multidisciplinary healthcare team, such as occupational therapists, physiotherapists, and psychologists, can further aid in managing this condition.
Additional Self-Help Strategies
Other practical measures to help manage ME/CFS include:
- Keeping a detailed diary of daily activities and their effects on symptoms
- Scheduling regular periods of relaxation
- Limiting daytime naps and maintaining a consistent bedtime routine
- Avoiding substances that may disrupt sleep, such as caffeine, nicotine, alcohol, and certain medications
Many people also find it beneficial to join a support group and connect with others who have ME/CFS. Sharing experiences and coping strategies can provide emotional support and practical advice.
When to Consult a Doctor
If you experience persistent fatigue that does not improve with rest, you should see a healthcare provider. There are many potential causes for these symptoms, and ME/CFS is just one possibility.