Some of the symptoms of dysautonomia can be distressing, others are downright crippling. Unfortunately dysautonomia is an invisible condition and those that live with it may also have to live with the insinuation -- or outright accusation -- that "it's all in your head". Implication? There is nothing wrong with you.
But dysautonomia is not all in your head. It's everywhere the autonomic nervous system (ANS) has an impact. That means, it is everywhere.
"No one is certain where dysautonomia comes from, only that it is a disorder of the central nervous system. A variety of things seem to trigger it: injury to the head or chest (including things like breast surgery), environmental toxins, and flu and other viral diseases. Because of the toxin issue, it is likely that the ill-defined Gulf War syndrome is also a disease that can be grouped under dysautonomia. No one is certain why other individuals exposed to the same hazards do not get dysautonomia, but it does seem to run in families."
http://www.healthy-holistic-living.com/dysautonomia.html