Gastric ulcer is one of the modern diseases, in which the gastric mucosa is damaged by gastric acid, causing pain and bleeding. The main symptoms of gastric ulcer include a feeling of fullness, nausea, vomiting and anorexia. Gastric ulcer can be classified into acute and chronic. Acute gastric ulcer is caused by stress and non-steroidal anti-inflammatory drugs (aspirin-type drugs) and is characterized by the appearance of many small ulcers. In contrast, chronic gastric ulcer is mainly caused by Helicobacter pylori and is characterized by the formation of a large, circular ulcerated lesion.