Nosebleeds

Nosebleeds (epistaxis) happen because the lining of the nose has a rich supply of small, fragile blood vessels close to the surface, particularly at the front of the septum. Most nosebleeds are 'anterior', coming from this spot, and are provoked by everyday things: dry air (especially in winter or heated rooms), nose-picking, forceful blowing, a minor knock, colds and allergies, or the use of nasal sprays. These are common, usually easy to stop with simple pressure, and not a sign of anything serious. High blood pressure is often blamed but is rarely the sole cause. What changes the picture is the pattern and the company the nosebleeds keep. Recurrent, heavy, prolonged, or spontaneous nosebleeds — and especially those alongside easy bruising, bleeding gums, heavy periods, or blood in the urine or stool — can reflect a problem with the blood's ability to clot. That may be from a low platelet count (as in immune thrombocytopenia, or a bone-marrow problem such as leukemia), from blood-thinning medication, or from a clotting disorder. So while an isolated nosebleed is almost always benign, a recurrent or unexplained bleeding tendency deserves a look.

• Dry air or a warm, dry room — the commonest trigger, especially in winter.
• Nose-picking, forceful blowing, or a minor knock.
• Colds, allergies and nasal sprays — irritated, inflamed lining.
• Blood-thinning medication — warfarin, DOACs, aspirin.
• A low platelet count — from immune thrombocytopenia (ITP), or a bone-marrow problem such as leukemia; often with easy bruising.
• A clotting disorder — inherited (e.g. von Willebrand disease) or acquired.
• High blood pressure — often blamed, but rarely the sole cause.

An occasional nosebleed with an obvious trigger needs no blood tests. When nosebleeds are recurrent, heavy, spontaneous, or come with other bleeding or bruising, blood tests help look for a cause: a full blood count (especially the platelet count, which if low needs explaining), and clotting tests (including the INR, particularly for anyone on a blood thinner). Haemoglobin shows whether repeated bleeding has caused anaemia. If a low platelet count or a clotting problem is found — or if bruising and bleeding are widespread — further specialist tests follow. Mediora.AI can surface a low platelet count, an abnormal clotting result or anaemia that helps explain a bleeding tendency, but a pattern of recurrent or unexplained bleeding needs proper assessment by your doctor.