The causes of drinking and vomiting blood, consider two factors: chronic digestive system diseases and violent vomiting, as follows: First, the patient has previous chronic digestive system diseases, alcohol for gastric mucosa stimulation after drinking a lot of alcohol, resulting in acute damage to the esophagus, stomach and duodenum, causing mucosal erosive bleeding. Second, the patient vomits violently or artificially induces vomiting after drinking alcohol, resulting in esophageal cardia mucosal laceration, such bleeding can usually stop by itself, such as small artery damage, which can cause serious bleeding. Patients with chronic digestive system diseases should usually have a light and easily digestible diet, avoid spicy foods, and avoid stimulation by tobacco, alcohol, strong tea and coffee. When vomiting blood occurs, seek medical attention for hemostasis, fluid replacement and gastroscopy to further clarify the cause and site of bleeding and promote recovery.