Older people with hard and bulging abdomen mainly consider constipation, acute abdomen, ascites, tumors and so on. 1. Constipation: the elderly gastrointestinal function is relatively weak, intestinal peristalsis is slow, food residues accumulate in the gastrointestinal tract can cause constipation, easy to appear abdominal hard bulging symptoms. 2. Acute abdomen: mainly including acute intestinal obstruction, acute peritonitis, gastric and duodenal perforation, etc., can cause the elderly abdomen suddenly hard and bulging, mostly accompanied by nausea, vomiting, fever, abdominal muscle tension, pain and other symptoms. 3. Ascites: such as portal hypertension caused by cirrhosis, water and urine retention can cause ascites in the elderly, which is manifested as abdominal distension, tightness of the abdominal wall, and symptoms of hard and bulging stomach. 4. Tumor: such as gastrointestinal tumors, with the increasing volume of the tumor, it can cause abdominal bulging and hard bulging symptoms. If the elderly have symptoms of hard and bulging abdomen, it is recommended to consult the doctor in time, clarify the cause of the disease under the guidance of professional physicians and carry out treatment to avoid delaying the condition.