Chronic Fatigue Syndrome (CFS), also known as Myalgic Encephalomyelitis (ME/CFS), is a complex, long-term illness. It causes extreme, debilitating fatigue that is not improved by rest and significantly interferes with a person’s ability to carry out normal, daily activities.
Core Symptoms
A diagnosis typically relies on the presence of several characteristic symptoms lasting 6 months or more in adults.
Post-Exertional Malaise (PEM): The hallmark symptom of ME/CFS. Even minor physical or mental exertion causes a severe, sometimes delayed worsening of symptoms that can last for days or weeks.
Unrefreshing Sleep: Patients frequently wake up feeling exhausted despite getting adequate sleep.
Cognitive Impairment: Often referred to as “brain fog,” this includes difficulties with memory, focus, and concentration.
Orthostatic Intolerance: Dizziness, lightheadedness, or fainting when sitting up or standing up quickly.
Pain: Deep aches or pains in the muscles, joints, or new types of headaches.
The exact cause of ME/CFS is unknown. Researchers suspect a combination of multiple triggers, which may include:
Prior Infections: Symptoms frequently develop following a viral or bacterial infection (such as mononucleosis or severe flu).
Immune & Cellular Changes: Dysregulation of the immune system or changes in how the body’s cells produce and process energy.
Risk Factors: The condition can affect anyone, but is diagnosed 2 to 4 times more often in women, and most commonly affects individuals between 40 and 60 years old.
Diagnosis & Management
There is currently no specific laboratory test or FDA-approved cure for ME/CFS. Diagnosis is made by reviewing clinical symptoms and physical examination findings, and by running tests to rule out other medical conditions.
Treatment strategies prioritize symptom management, often focusing on pacing daily physical and mental activities to prevent symptom worsening. Management plans might include over-the-counter medications for pain and addressing sleep disturbances.