Frequent diarrhea in the elderly can be caused by dietary factors, gastric diseases, intestinal diseases or liver, gallbladder and pancreatic diseases, etc. It is recommended to consult a doctor in time. 1. Dietary factors: such as overeating, unhygienic diet, food is too greasy, food with toxicity, etc. can trigger frequent diarrhea. 2. Gastric diseases: such as gastrocolic fistula, chronic atrophic gastritis, gastric cancer, etc., can be due to the stomach contents into the intestines too quickly, or stomach acid to reduce and trigger frequent diarrhea, the patient may also be accompanied by loss of appetite, epigastric pain, abdominal distension and other uncomfortable symptoms. 3. Intestinal diseases: such as cholera, enteritis, amoebic dysentery, irritable bowel syndrome, ulcerative colitis, Crohn’s disease, etc., the patient may also be accompanied by fever, emaciation, bloody stools, abdominal pain and other symptoms. 4. Liver, biliary and pancreatic diseases: such as cirrhosis of the liver, cholecystitis, pancreatitis, etc., can affect the discharge of digestive juices and lead to frequent diarrhea, and the patient may be accompanied by abdominal discomfort, nausea, vomiting, jaundice and other symptoms. When frequent diarrhea occurs in the elderly, they should consult a doctor in time to identify the cause of the disease under the guidance of the doctor and follow the doctor’s instructions to carry out the appropriate treatment.