Diarrhea once a day in the morning is not normal, it may be caused by gastrointestinal disorders, gastritis, gastric ulcer, and also may be caused by indigestion, usually should pay more attention to a light diet, avoid abnormal diet and rest, regular and reasonable diet, avoid spicy and stimulating greasy food, eat more light and warm, good digestion and absorption of food, normal and reasonable eating habits, can promote better absorption of the gastrointestinal tract and the survival of the flora. If you have diarrhea once in a while, it may be caused by poor diet, but if you continue to have habitual diarrhea, it may be a lesion in the digestive tract, so you should go to the hospital for examination in time and use reasonable medicine to avoid intestinal disorders. However, if there is an underlying enteritis or gastric ulcer, it should be taken seriously.