What should you know about bloody cough from nose?

A dry or irritated nose can bleed slightly without a dramatic nosebleed. Blood may trickle backward while you sleep or during congestion, collect in the throat, and be cleared by coughing. Allergic rhinitis, a common cold, and sinusitis can cause swelling, mucus, repeated blowing, or throat clearing that aggravates the lining. Blood from the nose is often bright red and mixed with saliva or mucus. Blood from the lower airways is more likely to come up with phlegm and may accompany wheeze, chest discomfort, or breathlessness, so the source cannot be confirmed by colour alone.

Check gently for a sore or bleeding nostril, but do not probe inside the nose. Sit upright, spit out blood rather than repeatedly swallowing it, and use gentle pressure if an active nosebleed starts. Saline spray may reduce dryness. Arrange an assessment if the source is unclear, the cough persists, or the blood returns. Tell the clinician about nasal symptoms as well as chest symptoms.

Get emergency help for breathing difficulty, chest pain, faintness, confusion, blue lips, heavy bleeding, or blood that keeps flowing. Seek prompt care for repeated episodes, a blocked or painful one-sided nose, fever with facial pain, coughing blood after an injury, or bleeding while taking anticoagulants.

Ask whether the blood is more consistent with the nose, throat, or lungs, and whether you need an examination of the nasal passages or chest. Mention congestion, allergies, reflux, smoking, recent infection, injury, and every medicine you take.