Last time, I had diarrhea, I was tired, but after a few days, it returned to normal but my stomach often boiled after eating. After a few days, I was back to normal, but yesterday I ate sour food, I had diarrhea, and my stomach was boiling again. Sometimes, after eating, my stomach boils for a long time but it doesn't hurt. So the doctor let me ask if it's okay to have diarrhea with stomach upset after eating? Thank you doctor.