Green sputum with blood: what to know

Hard or frequent coughing can irritate small blood vessels in the throat or airways, leaving pink or red streaks in phlegm. Chest infections, including Acute Bronchitis or Pneumonia, can also produce green sputum and blood. Bleeding from the nose, gums, or mouth may mix with mucus before it is coughed out.

Recurrent phlegm with blood can occur with Bronchiectasis or COPD and should be assessed in the context of your usual symptoms. The appearance alone cannot identify the source. The Coughing Up Phlegm page covers how to describe mucus clearly to a clinician.

Arrange medical advice promptly and describe whether the blood was a streak, clot, or larger amount, and whether it happened once or repeatedly. Photographing the sputum may help if the symptom stops before review. Avoid smoking and strenuous activity while you are waiting for advice.

Do not take someone else’s antibiotics or medicines that affect clotting without professional guidance. If you have a prescribed lung-condition action plan, follow it while contacting your care team. A clinician may examine your nose, mouth, chest, and breathing.

Call emergency services for more than a small streak of blood, ongoing bleeding, severe breathlessness, chest pain, fainting, blue lips, or new confusion. These signs can indicate a serious problem requiring immediate treatment.

Seek same-day assessment for repeated blood-stained sputum, fever, worsening cough, night sweats, unexplained weight loss, or a new change in breathing. People with lung disease, recent surgery, or medicines that thin the blood should seek advice without delay.

Ask: Where might the blood be coming from? What examination or tests do I need? Could my medicines or an existing lung condition be contributing, and what should I do if it happens again?