Spitting up blood is not a
commonCommon cold symptom for gastroparesis. I would look for other causes, including an ulcer or inflammation of the upper digestive tract.
You can start either with an upper GI series or upper endoscopy.
The vagus nerve is associated with the parasympathetic, rather than sympathetic, nervous system.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin Pho, M.D.
KevinMD.com
Twitter.com/kevinmd