bad beath would confirm the problem of vagus nerve , bad breath is produced because of poor parasympathetic system activity hence poor digestion and poor enzyme activity so what happens is that even our livers are supplied by vagus nerve , and when there is poor function of vagus nerve the metabolism of liver is no longer well , Aoutonomi dysfunction , heart problem (pounding pulse ) cuz of reduced parasympathetic , diarrhea and constipation :(parasympathetic ) , intolerance to food :poor digestion which lead to leakyy gut and hence immune dysfunction and food intolerance it is one etiology whivh leads to the whole pathway of symptoms