Fatigue can stem from a variety of illnesses and life stressors, but when that exhaustion lasts for months it may indicate a condition called chronic fatigue syndrome.

The number of Americans living with chronic fatigue syndrome is beginning to become more clear. An estimated 3.3 million U.S. adults have the disorder, which affects multiple body systems and causes ...

ME/CFS and the closely related long COVID could be caused by damage to the brainstem, according to a new scientific theory.

The largest study so far into the genetics of chronic fatigue syndrome, or myalgic encephalomyelitis, has implicated 259 genes – six times more than those identified just four months ago ...

It’s normal to feel wiped out after a hectic week, a poor night’s sleep or a lingering cold. But for some people, exhaustion isn’t something that goes away after rest. It becomes a constant companion ...

CHICAGO (Reuters) - A mouse virus called XMRV, which has been fingered as a cause of chronic fatigue syndrome, is likely not responsible for the mysterious disease, according to two studies released ...

Constant tiredness despite enough sleep may signal health issues like anemia, thyroid problems, diabetes, or sleep apnea.

January 30, 2014 • The Institute of Medicine is reviewing how chronic fatigue syndrome is diagnosed. But some patients and doctors say the one of the biggest problems is the name itself. The hallmark ...

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For people with chronic fatigue syndrome, sleep problems are common. Sleep disorders, disruptive and non-refreshing sleep are some of the most frequent complaints from people suffering from chronic ...