Elderly people with high blood sugar diarrhea may be caused by intestinal infections, diarrhea caused by autonomic neuropathy, or it may be caused by the side effects of glucose-lowering drugs. Elderly people have low resistance and are prone to intestinal infections that cause diarrhea. At the same time, hyperglycemia will exist energy metabolism disorder, protein metabolism increases, synthesis decreases, so that the body resistance decreases, increasing the risk of gastrointestinal infections. If the long-term control of blood glucose is not satisfactory, there will be autonomic neuropathy, when the gastrointestinal autonomic nerve has damage, may cause gastrointestinal dysfunction, abdominal distension, diarrhea, indigestion and other symptoms. In addition, some hypoglycemic drugs, such as acarbose, may appear diarrhea because of the side effects of the drug, you can contact your doctor to adjust the medication in time. Elderly people with high blood sugar diarrhea should go to the hospital in a timely manner, improve the relevant examination, standardized treatment under the guidance of the doctor.