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