Brainstem Abnormalities in ME/CFS: A Scoping Review and Evaluation of Magnetic Resonance Imaging Findings
POIS/CFS/POTS could be brainstem pathologies as in overlap of affected areas within the brainstem.
And now this amazing article that explains why amino acids, vasodilators, immune mediators help both POIS and CFS. It is an irrigation issue!https://www.healthrising.org/blog/2021/12/08/energy-chronic-fatigue-syndrome-immunometabolic-disease/