The 80-year-old old man should pay attention to the stomach pain, may be inflammatory diseases or tumor disease, may also be heart disease, hernia and so on caused by. 1. Inflammatory diseases: the most common abdominal inflammatory diseases are appendicitis, appendicitis, cholecystitis, gastroenteritis, etc., which need to be clearly diagnosed and then targeted medication, or take surgical treatment. 2. Tumor diseases: this kind of diseases need abdominal imaging examination to be clear, such as abdominal ultrasound, CT, etc. For example, gastric cancer, pancreatic cancer, liver cancer, etc., which need to be operated as early as possible and combined with postoperative radiotherapy. 3. Heart disease: if the pain is in the middle and upper abdomen, accompanied by chest tightness, upper extremity radiating pain and other symptoms, it may be heart disease, such as angina pectoris, myocardial infarction, etc., and need to go to the Department of Cardiology in time for examination, medication, or interventional surgery and other treatments. 4. Hernia: when there is an abdominal hernia, the pain of incarceration will occur because of the change in the location of the tissues, in which case surgical treatment is required if necessary, and if there are contraindications to surgery, conservative treatment can be taken. It is recommended to go to the gastroenterology or cardiology department in time for further examination, clear diagnosis, do not blindly use drugs.