The hardness of the abdomen of the elderly, consider with intestinal obstruction, constipation, peritonitis and other diseases, go to the hospital for further examination to clarify the cause of the disease. 1. Intestinal obstruction: usually due to intestinal obstruction causes gastrointestinal peristalsis to slow down, feces in the intestinal tract, the water is absorbed by the intestinal lumen, resulting in dry stools, the phenomenon of hardness of the abdomen of the elderly, intestinal obstruction may also appear diarrhea, pain, vomiting and other symptoms. 2. Constipation: usually due to constipation, resulting in dry stools, which in turn causes the phenomenon of hardness in the abdomen of the elderly, constipation may also occur in defecation and other symptoms. 3. Peritonitis: may be due to peritonitis, resulting in peritoneal irritation caused by the abdominal wall tension symptoms, the phenomenon of hardness of the abdomen of the elderly, peritonitis may appear abdominal pain, vomiting, nausea and other symptoms. There are many other causes of abdominal stiffness in the elderly, it is recommended to consult a doctor in time to determine the treatment plan under the guidance of the physician.