What should you know about lung cancer and nosebleeds?

The delicate blood vessels inside the nose can bleed after dry air, nose picking, forceful blowing, allergies, infection, or injury. Medicines that affect clotting can make bleeding easier to start or harder to stop. Cancer treatment may also contribute indirectly through low blood counts, irritated mucous membranes, or changes in clotting.

Nosebleeds are not a typical way to identify lung cancer. A clinician considers the pattern of bleeding, other symptoms, medicines, blood pressure, and examination findings. Lung cancer commonly presents with respiratory symptoms; a persistent hoarse voice should be assessed, but it does not by itself identify the cause.

Sit upright, lean slightly forward, and pinch the soft part of the nose continuously while breathing through your mouth. Spitting out blood is safer than swallowing it. Once bleeding stops, avoid forceful blowing, heavy exertion, and picking the nose for a while. Do not put tissues deep inside the nostril.

Tell the oncology team about recurrent bleeding, easy bruising, or medicines such as anticoagulants. Do not stop a prescribed blood thinner without medical advice. The team may check blood counts or arrange an ear, nose, and throat assessment.

Seek urgent help if bleeding is heavy, follows a significant injury, causes dizziness or faintness, interferes with breathing, or does not settle with sustained pressure. Also seek prompt care for black stools, vomiting blood, widespread bruising, or marked weakness.

Could my medicines or blood counts be contributing? Does the bleeding need a nose examination? What should I do if it starts again? Should I use a humidifier or saline product? Which symptoms mean I should attend an emergency department?