 [ Symptoms ] 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 does not agree with me thank you [ Disease ] 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