Coughing up blood after drinking alcohol

Alcohol may coincide with forceful coughing, reflux or vomiting, each of which can irritate the throat. Vomiting blood is different from coughing blood and can arise from the upper digestive tract, so describe the action that came first. Alcohol can also worsen dehydration and make mucus thicker, which may provoke harder coughing. The bleeding may instead reflect pneumonia, bronchiectasis, a pulmonary embolism or another lung condition, including lung cancer; the timing after a drink does not establish the cause.

A clinician will want to know whether blood was bright red or mixed with mucus, whether there were clots, and whether you had chest pain, breathlessness, fever, abdominal pain or repeated vomiting.

Stop drinking alcohol and sit upright, leaning slightly forward. If bleeding is continuing, substantial or accompanied by weakness, call emergency services. Keep any sputum or a photograph available if safe, and note whether coughing or vomiting came first. Avoid smoking and avoid taking aspirin or other medicines that affect clotting unless a clinician has specifically advised them. Bring your medicine list and explain how much you drank without embarrassment; accurate information helps the team choose the right assessment.

Call emergency services for more than a small streak, ongoing or recurrent blood, clots, breathlessness, chest pain, fainting, confusion, severe weakness or black stools. Repeated vomiting with blood also needs emergency care. Do not drive yourself if you are dizzy, intoxicated, actively bleeding or short of breath.

Ask whether the blood most likely came from the airways or digestive tract, whether tests or imaging are needed, and which medicines or activities to avoid. Tell the clinician about smoking, liver disease, reflux, previous lung problems, vomiting and any use of blood-thinning medicines.