Question: why does my stomach hurt in the morning and i have diarrhea?
Answer: Share on Pinterest IBD, IBS, and allergies may be causes of morning diarrhea. Long-term conditions that may cause morning diarrhea include: Irritable bowel syndrome (IBS): One of the leading causes of morning diarrhea is IBS. Psychological stress and certain foods may be triggers, but the exact cause of IBS is unknown.