postprandial pain≒ postprandial distress syndrome(PDS)
differentials

pòʊs(t)prˈændiəl

gastric ulcer,
☆chronic pancreatitis → malabsorption with weight loss and steatorrhea
gallstones,
☆gastric ischemia(intestinal angina, mesenteric ischemia)

(or functional GI disorders (FGID)such as)
irritable bowel syndrome(IBS),
gastroparesis,
functional dyspepsia(FD)

etiology gastrointestinal UWorld