What causes CFS?
The cause of the illness is not yet known. Current theories are looking at the possibilities of neuroendocrine dysfunction, viruses, environmental toxins, genetic predisposition, or a combination of these. For a time it was thought that Epstein-Barr Virus (EBV), the cause of mononucleosis, might cause CFS but recent research has discounted this idea. The illness seems to prompt a chronic immune reaction in the body, however it is not clear that this is in response to any actual infection — this may only be a dysfunction of the immune system itself. A recent concept promulgated by Prof. Mark Demitrack is that CFS is a generalized condition which may have any of several causes (in the same way that the condition called high blood pressure is not caused by any one single factor). It *is* known that stressors, physical or emotional, seems to make CFS worse. Some current research continues to investigate possible viral causes including HHV-6, other herpes viruses, enteroviruses, and retrov
No one knows for sure what causes CFS. Many people with CFS say it started after an infection, such as a cold or stomach bug. It also can follow a bout of infectious mononucleosis (mono), the “kissing disease” that drains your energy. Some people with CFS say it started after a time of great stress, such as the loss of a loved one or major surgery. It can be hard to figure out if a person has CFS because extreme tiredness is a common symptom of many illnesses. Also, some medical treatments, such as chemotherapy, can cause extreme tiredness.
