Facial flushing : You may have a hot flash sensation with dizziness in response to a prominent autonomic nervous system mediated blood vessels dilatation. The autonomic nervous system is linked to your emotions as well. When nervous, your blood vessels, mediated by sympathetic autonomic function dilates the blood vessels to your face ( and your entire skin vasculature). As blood is shifted you feel dizzy and tired.
Answered 12/10/2013
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