Elderly diarrhea is good for 7 days without stool may be due to less excreta, excretory function is weakened, intestinal flora imbalance and other reasons. 1. less excretion: the elderly diarrhea will be intestinal food debris along with water electrolytes out of the body, resulting in the presence of intestinal food debris in the amount of small, can not be formed into stools, diarrhea may occur after 7 days of no stools. 2. weakened excretory function: the elderly diarrhea after the use of drugs to reduce intestinal peristalsis to ease the symptoms, the drugs will cause the excretory function is weakened, diarrhea is good for 7 days without stools. 3. intestinal flora imbalance: the elderly diarrhea intestinal flora imbalance, a large number of beneficial bacteria were destroyed, harmful bacteria breeding, resulting in slow intestinal peristalsis, diarrhea well 7 days without stool. It is recommended that the elderly patients to the hospital, under the guidance of the doctor’s clear diagnosis of the correct management, daily drink more warm water, pay attention to balanced nutrition, moderate consumption of food rich in dietary fiber.