“Under the new proposals from the IOM, diagnosing chronic fatigue would require three core symptoms:

These are:

* Fatigue and a reduction in activity that lasts for more than six months

* Fatigue that gets worse after exertion

* Sleep that is unrefreshing despite exhaustion

Patients must also have at least one other symptom of the following:

* Cognitive impairment, sometimes described as ‘brain fog’

* What’s called orthostatic intolerance – meaning symptoms improve when lying down and patients find it hard to stay upright for long.”

Read more: http://www.dailymail.co.uk/health/article-2949369/Chronic-fatigue-real-disease-Doctors-draw-new-guidelines-diagnose-condition.html