Pneumonia and throwing up blood: what to know

Blood can be coughed up from irritated airways during a forceful cough, or vomited from the upper digestive tract after repeated retching. Bright-red blood, dark material resembling coffee grounds, or blood mixed with mucus can have different causes. Pneumonia may occur alongside influenza or COVID-19, and severe infection can affect breathing and the whole body. A clinician may ask whether the blood came after coughing or nausea, how much appeared, and whether you have chest pain, fever, dizziness, or black stools.

Arrange urgent medical assessment today, especially if the source is unclear. Sit upright, avoid driving if weak or dizzy, and keep a note of the colour and approximate amount of blood. Do not take leftover antibiotics or medicines that suppress coughing unless a clinician advises them. Bring your medicines and mention blood thinners, stomach problems, recent nosebleeds, and smoking. Information about pneumonia, Cough, and Coughing Up Phlegm can help you describe the illness, but it cannot replace an examination.

Call emergency services or go to an emergency department if bleeding is more than a small streak, keeps returning, or comes with trouble breathing, blue or grey lips, severe chest pain, fainting, confusion, cold clammy skin, or marked weakness. Seek immediate help for vomiting blood with black stools or severe abdominal pain. Fever, Chills, or rapidly worsening breathing during pneumonia can signal a serious infection such as Sepsis.

Ask: Did the blood come from coughing or vomiting? What tests will locate the source? Could my medicines increase bleeding? How should I monitor my breathing and temperature at home? Which changes mean I should return immediately?