If diarrhea occurs occasionally in the morning, consider the cause to be related to improper eating the night before or a cold stomach at night while sleeping. For acute diarrhea caused by poor intestinal function or intestinal infection caused by the above factors, adjust your diet and keep your abdomen as warm as possible in time for this situation. If the symptoms are not very serious, they can be relieved on their own. If the symptoms are more serious, causing severe diarrhea, accompanied by nausea, vomiting, and even fever, you need to take medication in time to avoid serious infection or cause dehydration. If this kind of morning diarrhea occurs for a long time, you need to consider whether there is chronic enteritis or chronic poor gastrointestinal function, and need further gastroenterology consultation and examination to clarify the diagnosis and early treatment.