Fatigue is one of the most frequent and debilitating symptoms of long COVID, and yet it is also one of the hardest to measure objectively. A new study suggests the extreme mental and physical fatigue ...

Conditions like myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) and more recently, long COVID, are the sources of significant confusion and contention among researchers, clinicians, and ...

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

Millions of people who recover from infections like COVID-19, influenza and glandular fever are affected by long-lasting symptoms. These include chronic fatigue, brain fog, exercise intolerance, ...

Fatigue in post-infectious myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) may stem from dysfunction of integrative brain regions that drive the motor cortex, a deep phenotyping study ...

Brain fog is a classic part of CFS and fibromyalgia, presenting as: Difficulty with word finding (e.g., remembering someone's name), Word substitution (e.g., calling your husband by the wrong name!), ...

Scientists have spent decades trying to pin down what fatigue really looks like inside the brain, but until now they have ...

If you find it hard to focus after a wakeful night, it’s because your brain is busy trying to catch up on crucial ...