Diarrhea in the morning, you can consider the following aspects of the cause: First, consider the night sleep leads to cold, cold blood vessels lead to contraction, intestinal wall mucosa is in a state of contraction, not be able to completely digest, absorb food, and intestinal mucosal permeability increases, there is a large amount of water produced by diarrhea, pay attention to warmth will slowly improve. Secondly, it is considered that patients with enteritis, chronic enteritis or acute enteritis will lead to increased permeability of the intestinal mucosa, and then diarrhea occurs. Third, irritable bowel syndrome is also the cause of diarrhea, often easily affected by emotional fluctuations or ate cooler, spicy, stimulating food and lead to diarrhea. Fourth, the patient himself has indigestion symptoms will be prone to diarrhea.