Nosebleed and vitamin deficiency: what to know

Vitamins help maintain skin, blood vessels and normal blood clotting. A severe deficiency can make tissues more fragile or interfere with clotting, which may contribute to repeated bleeding. This is uncommon as the only reason for a nosebleed. Dry air, nose picking, forceful blowing, allergies, a cold or sinus irritation can damage the small vessels near the front of the nose. High blood pressure may make bleeding harder to control, although it does not explain every episode.

A nosebleed itself cannot identify which nutrient, if any, is lacking. A clinician may ask about your diet, digestive symptoms, medicines and other bleeding, then decide whether an examination or blood tests are appropriate.

Sit upright and lean slightly forward so blood does not run into your throat. Pinch the soft part of your nose continuously while breathing through your mouth. Do not tilt your head back or keep checking before the pressure has had time to work. Once bleeding stops, avoid vigorous nose blowing, picking and strenuous activity for the rest of the day. Moisturising the inside of the nose with a suitable saline product and using a humidifier can help when dryness is a trigger.

Do not start vitamin supplements just because you have had a nosebleed. Excess supplements can cause harm and may interact with medicines. Arrange a routine appointment if episodes recur, you bruise easily, or your diet is very restricted.

Seek urgent medical help if bleeding is heavy, follows a significant injury, causes faintness or breathing difficulty, or does not stop after sustained firm pressure. Get prompt advice if you take a blood-thinning medicine, have a known bleeding disorder, or notice bleeding from other sites. Repeated nosebleeds deserve assessment even when each episode settles, because the cause may be nasal irritation, medication, blood pressure or a less common medical problem.

Ask whether your pattern suggests dryness or another nasal condition, whether any medicine could be contributing, and whether blood tests are needed. Tell the clinician what you eat, how often the bleeding occurs, which nostril is affected, how long it lasts and whether you have bruising, tiredness or digestive symptoms.