Brain fog

Brain fog, mental fog, or cloudiness of consciousness, are terms used in medicine denoting an abnormality in the regulation of the overall level of consciousness that is mild and less severe than a delirium.

It is a type of cognitive impairment experienced by ME/CFS patients. Fibromyalgia patients often refer to it as "Fibro-fog".

Prevalence

 * Katrina Berne reports a prevalence of 75-100% for confusion and inability to think clearly.

Notable studies

 * 2013, What is brain fog? An evaluation of the symptom in postural tachycardia syndrome

Learn more

 * 20 Aug 2013, Brain Fog in ME/CFS: What’s Going On?