Irritable Bowel Syndrome (IBS) might lead to morning diarrhea, as intestinal motility is relatively slower while asleep and speeds up upon waking. This could result in an increased frequency of bowel movements in the morning, and severe cases may experience diarrhea. For patients with IBS experiencing diarrhea, it is recommended to take oral medication to adjust the intestinal flora, as well as bi-directional enteric neuromodulators, such as trimebutine maleate. It is also important to closely monitor any changes in the condition and return for follow-ups as needed. (Please take medication under the guidance of a doctor.)