Coughing up sputum with blood when drinking alcohol at night may be caused by pneumonia or lung abscess, tuberculosis, bronchial dilatation combined with infection, lung cancer or other related diseases, which need to identify the cause in time and target treatment. 1. Pneumonia or lung abscess: coughing up sputum and hemoptysis can occur, and hemoptysis can be induced by vasodilatation after drinking alcohol. 2. Tuberculosis: This is a special kind of lung infectious disease, caused by Mycobacterium tuberculosis infection. Compared with pneumonia, it is more likely to be accompanied by coughing up sputum with blood, and there may also be low fever in the afternoon, night sweats (abnormal sweating after going to sleep, and the sweating stops after waking up) and other symptoms. 3. Bronchial dilatation combined with infection: bronchial dilatation may recur with coughing and sputum with blood in the sputum, drinking alcohol and other related factors can trigger the onset of the above symptoms. 3. Lung cancer: coughing up sputum with blood in sputum may occur in lung cancer, especially when the above symptoms continue to be unrelieved, it is necessary to be alert to this disease. Lung cancer patients who drink alcohol may also cough up sputum with blood due to tumor invading blood vessels. 4. Other reasons: for example, bleeding from nasal cavity with secretion flowing back to the throat, or bleeding from ulcers in the throat, coagulation dysfunction, connective tissue disease and so on. There may also be digestive bleeding due to alcohol consumption, which may be mistaken for hemoptysis when it is coughed out of the body. Therefore, coughing up sputum with blood several times after drinking alcohol, you need to go to the line in time. Examine the cause of the disease.