Nosebleeds (epistaxis): a case-based approach

The presentation

Imagine an adult who is sitting at home when, without warning, blood starts to trickle then drip from one nostril. It may have been triggered by blowing the nose hard, picking it, a knock, dry air, or nothing obvious at all. They feel alarmed and instinctively tip their head back, which only makes blood run down the back of the throat and can cause coughing or a feeling of sickness. This is a very common picture: most nosebleeds come from small, delicate blood vessels near the front of the nose, which are easily disturbed. The blood may look dramatic, but in the great majority of cases the bleeding is from these front vessels, is not dangerous, and can be stopped at home with the right technique. Knowing what to do turns a frightening moment into a manageable one.

Why nosebleeds happen

The lining of the nose is rich in tiny, fragile blood vessels that sit very close to the surface, especially near the front of the middle wall that divides the two nostrils. Because they are so exposed, these vessels bleed easily. Common triggers include blowing or picking the nose, a minor knock, colds and allergies that inflame the lining, and dry air from central heating or cold weather, which cracks the surface. Some people are more prone to nosebleeds, including those taking blood-thinning medicines, people with high blood pressure, and those with certain bleeding conditions. Less commonly, bleeding comes from deeper vessels towards the back of the nose, which tends to be heavier and harder to stop. Most nosebleeds, though, are from the easily reached front vessels and settle quickly once pressure is applied correctly.

The correct first aid

If you or someone else has a nosebleed, sit down and lean forwards, not backwards, so blood drains out of the nose rather than down the throat. Using finger and thumb, firmly pinch the soft part of the nose, just below the bony bridge, and keep pinching without letting go for 10 to 15 minutes. Breathe through your mouth while you do this. It can help to place a covered ice pack or a cold, damp cloth on the bridge of the nose or the back of the neck. Do not tip the head back, do not lie down, and do not keep releasing to check, as this disturbs the forming clot. Spit out any blood that reaches your mouth rather than swallowing it, which can cause nausea. After the bleeding stops, avoid blowing your nose, bending, heavy lifting or hot drinks for several hours.

When to seek help

Most nosebleeds stop with 10 to 15 minutes of firm pressure. Seek urgent help — call 999 or go to A&E — if the bleeding is very heavy, if you are gulping or vomiting large amounts of blood, if you feel faint, dizzy or short of breath, or if the nosebleed follows a serious injury such as a car crash or a heavy blow to the head. Contact NHS 111 or your GP the same day, or attend A&E, if the bleeding has not stopped after 20 to 25 minutes of correct pressure, if nosebleeds keep coming back, if you take blood-thinning medicine, if you have a known bleeding disorder, or if a young child or frail older person has a nosebleed that will not settle. Getting checked helps rule out heavier bleeding from the back of the nose and any underlying cause.

The safe pathway

The practical rule is simple: sit up, lean forward, pinch the soft part of the nose for a full 10 to 15 minutes, and resist the urge to keep checking or to tip the head back. Most nosebleeds will stop this way and need nothing more than gentle care afterwards. Escalate to urgent care if bleeding is heavy or will not stop despite correct pressure, if you feel faint, or if it follows a significant injury. If nosebleeds happen often, it is worth seeing your GP to look for a cause and to discuss simple prevention, such as keeping the nasal lining moist and avoiding picking or hard blowing. This is general education, not a substitute for professional care — when in doubt, or if you are worried, seek advice, and always call 999 for very heavy bleeding or collapse.