Acid reflux and blood in spit

The blood may come from the gums, nose, mouth or throat, or it may be coughed up from the airways. Blood brought up with vomiting is a different emergency warning. Identifying how it appeared helps clinicians choose the right assessment.

Reflux can irritate the throat and contribute to throat clearing or cough, but visible blood needs another explanation considered. Bleeding gums, a recent nosebleed draining backwards, a mouth sore or forceful coughing may leave streaks in saliva. Blood mixed with phlegm can arise from an airway infection or another lung or airway problem.

Note whether you spat, coughed or vomited before seeing blood, its colour and approximate amount, and whether it happened again. Also note fever, breathlessness, chest pain, nose or gum bleeding, black stools and any medicine that affects bleeding.

Contact a clinician promptly even if the amount seems small, particularly when the source is unclear or the bleeding recurs. Do not stop a prescribed blood-thinning medicine on your own; tell the clinician what you take and follow their advice. Avoid repeatedly clearing your throat, and do not rely on reflux remedies to explain or treat bleeding.

If it is safe to do so, a photograph of the blood and a note about what happened immediately beforehand can assist the consultation. A clinician may examine the mouth and nose, listen to the chest and decide whether further tests are needed.

Seek emergency care now if there is more than a small streak, bleeding continues, you are short of breath, faint or confused, or you have chest pain, a very fast heartbeat, blue or grey lips, or vomit that contains blood or resembles dark granules. Black, tar-like stools are also an urgent warning. Do not drive yourself if you feel faint or breathless.

Ask which source of bleeding appears most likely from the examination, whether a cough or nasal problem needs investigation, and whether any medicine changes your bleeding risk. Clarify exactly what recurrence or associated symptom should send you directly to emergency care.