The presence of epigastric pain when the waist is straightened may indicate gastrointestinal pathology, that is, abdominal pain caused by postural discomfort of the gastrointestinal function. For example, gastric ulcer, duodenal ulcer, gastritis, enteritis, spleen deficiency, and stomach deficiency may lead to pain in the upper abdomen when the digestive juices in the abdominal cavity irritate the peritoneum during a change in position. The pain in the upper abdomen must be differentiated from cardiovascular and cerebrovascular. Often, in acute heart attack, the upper abdomen will also be painful, so an electrocardiogram should be done for screening to exclude heart disease. In addition, a CT examination of the abdomen, especially the upper abdomen, should be performed to see if there is a functional or organic lesion, which must be ruled out in a timely manner.