Explaining The Chronic Fatigue Syndrome

Chronic fatigue syndrome is a complicated disorder characterized by extreme fatigue that lasts for at least six months and that can't be fully explained by an underlying medical condition. The fatigue worsens with physical or mental activity, but doesn't improve with rest.



The causes of CFS aren’t fully understood yet. Some theories include viral infection, psychological stress, or a combination of factors. Because no single cause has been identified, and because many other conditions produce similar symptoms, CFS can be difficult to diagnose.


There are no tests for CFS. Your doctor will have to rule out other causes for your fatigue when determining a diagnosis. While CFS was previously a controversial diagnosis, it’s now widely accepted as a medical condition.


Other characteristic symptoms include:


Sleep that isn't refreshing

Difficulties with memory, focus and concentration

Dizziness that worsens with moving from lying down or sitting to standing


The cause of CFS is unknown. Researchers speculate that contributing factors may include:


viruses

a weakened immune system

stress

hormonal imbalances

It’s also possible that some people are genetically predisposed to develop CFS.


Though CFS can sometimes develop after a viral infection, no single type of infection has been found to cause CFS. Some viral infections that have been studied in relation to CFS include those caused by:


Epstein-Barr virus (EBV)

human herpesvirus 6

Ross River virus (RRV)

rubella virus


Fatigue can be a symptom of many illnesses, such as infections or psychological disorders. In general, see your doctor if you have persistent or excessive fatigue.


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