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Our Health Library information does not replace the advice of a doctor. Please be advised that this information is made available to assist our patients to learn more about their health. Our providers may not see and/or treat all topics found herein.

Myalgic encephalomyelitis/chronic fatigue syndrome

Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a disease that causes someone to feel so ill that they can't do their normal daily activities. People with ME/CFS have problems sleeping and extreme fatigue that doesn't get better with rest. Any kind of activity often makes their symptoms worse. This is called post-exertional malaise. They may have other symptoms like problems with thinking.

Another name for this condition is systemic exertion intolerance disease (SEID).