This is for everybody really.
Lately my POIS comes with heavy digestion issues. Or my POIS is very light (with niacin) or I end up with 3 or 4 days of bad stomach with nausea.
I don't know if I have developed some gastric problem (related or not to POIS), or if my POIS has just changed, and now upsets the gastric system more aggressively.
When it's bad, I can't eat anything. My nausea starts about an hour after eating, and lasts for 4 to 6 hours. It seems worse every other day. day 1 bad, day 2 light, day 3 bad, day 4 lighter... etc.
BUT, and this is why I put this here: I do vagal stimulation, and it helps tremendously. I started scratching my ears, where they would normally put the stimulator. That worked a little bit, but not if the problem was strong, and in any case didn't last long.
Lately, I've taken to scratching (as if I had an itch) the chest bone area. An area about 15 cm in diameter. Then I massage the upper middle part of the muscle that runs under the "clavicle??" on each side. I think that's what it's called. These are the bones that goo from the shoulder to below the adam's apple.
Honestly, it work in about 1 minute and lasts for a good time. And is repeatable. Not even strong medicine helps, but that does!!
I haven't tried it for other symptoms. I took niacin this last time, and probably didn't get a big enough flush. So the niacin seems to have prevented the cognitive symptoms, but has left this digestive issue behind.