Is this a typical problem? Diarrhea that occurs after you eat a meal is called postprandial diarrhea. This type of diarrhea is often unexpected, and the feeling of having to go to the bathroom can be quite urgent. Some people with postprandial diarrhea experience pain during bowel movements. In most cases, this pain goes away after a bowel movement. This condition is not uncommon, but it can be difficult to diagnose. That's because postprandial diarrhea is sometimes a symptom of another condition.