Vomiting coffee-colored thick liquid after drinking alcohol is related to diet, gastric bleeding and cardia tear. 1. Diet: Vomiting coffee-colored viscous liquid can occur when eating coffee-colored food such as sweet potatoes and pig’s blood while drinking alcohol, or drinking red wine and mixing with gastric juices after entering the stomach and intestines. 2. Gastric hemorrhage: stimulation by alcohol can lead to acute bleeding of the gastric mucosa. Especially in patients with gastric ulcer and other diseases, it is easy to induce gastric hemorrhage, and then the symptom of vomiting coffee-colored viscous liquid. 3. Cardia tear: after drinking a lot of alcohol, alcohol stimulates the gastric mucosa, which will trigger vomiting. If the vomiting is serious, it may cause cardia tear, which will also cause the symptom of vomiting coffee-colored thick liquid. This phenomenon should be taken seriously. If you are unable to determine the cause on your own, you should consult a doctor in time for examination and treatment of the cause.