Hi, People with diabetes may develop diarrhea for a variety of reasons. Diarrhea is a symptom of many diseases such as viral or bacterial infections, celiac disease, irritable bowel syndrome, and Crohn's disease. It is a side effect of some medications, such as metformin, and some sugar-free sweeteners can cause diarrhea in some people. However, diarrhea can also be a symptom of a type of autonomic neuropathy. This is what is known as diabetic diarrhea.  Autonomic neuropathy damages the nerves that control involuntary activities of the body.  Kindly consult Physician...