Frequent diarrhea in the elderly may be caused by indigestion, intestinal flora disorders, intestinal infections, diabetes and so on. 1. Indigestion: the digestive function of the elderly is relatively weak, if the usual diet is not appropriate, resulting in indigestion, food can not be fully digested and absorbed, there will be diarrhea, bloating, loss of appetite and other symptoms. 2. Intestinal flora disorders: the decrease of beneficial bacteria and the increase of harmful bacteria in the intestines lead to faster intestinal peristalsis, thus frequent diarrhea. 3. Intestinal infections: such as intestinal viral infections, bacillary dysentery, amoebic dysentery, etc., can lead to frequent diarrhea symptoms. 4. Diabetes: If blood sugar control is poor, it can easily lead to gastrointestinal neuropathy, which can lead to diarrhea. Frequent diarrhea in the elderly may also be caused by other diseases, such as intestinal polyps, ulcerative colitis and intestinal cancer, etc., should be timely consultation, identify the cause of targeted treatment.