The common features of gastric ulcer and duodenal ulcer: 1. Clinical symptoms, both of them will show regular pain in the upper abdomen, the nature of abdominal pain is often distended, closely related to diet. The common features are: 1) clinical symptoms, both of which are characterized by regular epigastric pain, often distending in nature and closely related to diet, and 2) physical signs, such as nausea, vomiting, acid reflux, belching, and loss of appetite. 3) common features in treatment, whether gastric or duodenal ulcer, both need to be treated with acid suppressants combined with gastric mucosal protectors. In the case of ulcers caused by H. pylori infection, a triple therapy program or quadruple therapy program is required to eradicate H. pylori.4. Common to complications, both may be complicated by bleeding and perforation.