The elderly diarrhea constipation is considered to be intestinal flora dysbiosis, gastrointestinal dysfunction, functional constipation and other conditions caused by the need for targeted treatment under the guidance of a doctor to drug therapy, such as polyethylene glycol electrolyte bulk, bifidobacteria, mosapride and so on. 1. Intestinal flora imbalance: constipation after diarrhea, may also be accompanied by abdominal pain; can take bifidobacterium bifidum, bacillus licheniformis and other probiotics treatment, when constipation can take polyethylene glycol electrolyte bulk diarrhea, diarrhea can be taken to stop the diarrhea when the severity of loperamide. 2. Gastrointestinal dysfunction: diarrhea and constipation can occur alternately; when constipation, polyethylene glycol can be taken or Kespal can be used to promote defecation, and if accompanied by abdominal distension, domperidone and mosapride can be taken to promote gastrointestinal dynamics. 3. Functional constipation: diarrhea may be caused by abdominal cold, eating unclean food, and then constipation is considered to be functional constipation; through moderate exercise, increased intake of food rich in corn, vegetables and other dietary fiber, drink more water and other ways to promote defecation; if lifestyle interventions can not be defecation can be taken to promote defecation polyethylene glycol. When constipation occurs after diarrhea and cannot be relieved by lifestyle interventions, it is recommended to go to the hospital. Medications should be taken under the supervision of a doctor.