The most common causes of vomiting and bleeding are: first, bleeding caused by diseases of the digestive tract, such as ulcer bleeding in the upper gastrointestinal tract, which leads to vomiting and bleeding. Second, gastric cancer, especially the advanced stage of gastric cancer, many patients will vomit bright red or dark red contents. Thirdly, gastroesophageal reflux disease, vomiting blood is mainly caused by dysphagia due to esophageal inflammation, which leads to vomiting blood. Fourth, esophageal cancer, especially in the advanced stage of cancer, may cause the symptoms of vomiting blood. Fifth, esophageal rupture, mainly due to mechanical injury caused by the vomiting of blood.