@Eaglefatigue It really varies from person to person. Based on this study ( Venous collapse regulates intracranial pressure in upright body positions ), it is normal physiology of the Jugular Veins to regulate the ICP so that the pressure of the brain is not negatively impacted by the pull of gravity (hydrostatic pressure). No one knows how upright posture will affect when your Jugulars are already impaired. We can only speculate at this point. Now your symptoms could be that when you are upright, you might be compressing it more or nerves might compressed more depending your neck position which tends to move alot when upright vs supine position. At this point it is just guess game. Here I talked about it here (Question for those with military/straight neck (loss of cervical lordosis) - #10 by KoolDude).
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