diarrhea never occurs immediately after eating or the same day. if there is intake of infectious food or water one may get diarrhea the same day.
how quickly can one get diarrhea after eating? . my spouse says that if i have diarrhea i should try to recall what i ate the day before. i think one can get diarrhea the same day within hours or even minutes after eating something that doesn't agree with me. thank you!