Hey there,
Dh has ptsd and has a plain horrible diet often eating lots of chocolate, nachos, cup cakes, stuff like this... and sometimes not eating at all... cannot get it down.
Recently I have learned all of that has to do with the nervous system of the gut.
A while ago hubby has discovered warmth (hot water bottle on the tummy) really helps him and fruit tea does. Do you know other things that help?