Nosebleed: Correct First Aid, When to Go In

Key takeaways

The two things people do most often, and NEITHER stops the bleeding: tipping the head back, and packing tissue or cotton wool up the nose. Tipping the head back only redirects the blood down the throat, causing choking and vomiting.
What works: sit down, lean the body and head FORWARD, pinch the SOFT part of the nose just above the nostrils — not the bony bridge — and keep pinching without letting go partway to check whether it has stopped.
A nosebleed in somebody who has had a fever for the past few days: think of dengue FIRST and be seen, rather than just stopping the bleeding and leaving it. Per CDC, bleeding from the nose or gums is a warning sign of severe dengue.
Bleeding that will not stop despite correct pinching, heavy bleeding, choking or vomiting up swallowed blood, bleeding after a knock to the head or face, somebody faint with pale skin and sweating, or anybody on blood-thinning medicine: go for emergency care now.
Repeated nosebleeds — especially when they are always on the SAME side — need a doctor to look inside the nose for the cause, not just bleeding stopped bout by bout.

The two things most often done wrong, first: tipping the head back, and packing tissue or cotton wool up the nose. Neither stops the bleeding. Most nosebleeds stop on their own if you get three things right: sit down, lean the body and head FORWARD, pinch the soft part of the nose — not the bridge — and keep pinching without letting go partway.

Recognising it: where the blood is coming from

Most nosebleeds start at the front of the septum, where the lining is thin and full of small vessels: bright red blood runs out of the nose, usually on one side, and you can see it. This kind responds well to pinching the nose.

Bleeding from further back behaves differently: more blood runs down the throat than out of the nose, the person tastes something metallic, feels sick, and may vomit up blood they have swallowed — and swallowing blood means you cannot tell how much has been lost. This kind is more serious and usually needs a medical facility.

The thing most easily missed: a nosebleed is only a sign

Per CDC, bleeding from the nose or gums is one of the warning signs of severe dengue, along with abdominal pain, persistent vomiting, vomiting blood, black stools, and the person being restless or lethargic; these signs typically appear just after the fever has gone. So anybody with a nosebleed who has had a fever over the past few days should think of dengue FIRST and be seen.

The fever going is not the same as getting better — that is in fact the point at which to watch most closely.

Per CDC, a nosebleed that happens spontaneously without a knock, lasts unusually long, or needs medical help before it stops is a sign to mention to a doctor: it can be a manifestation of a bleeding disorder, particularly alongside bruising easily or heavy periods.

What to do now

Sit down, do not lie down; lean the body and head forward with the mouth open — so the blood runs out rather than down the throat.
Pinch the SOFT part of the nose, just above the nostrils, between index finger and thumb. Do not pinch the bony bridge: that spot cannot press on the place that is bleeding.
Keep pinching — for longer than you think is needed — and do not let go partway to check whether it has stopped. A clot needs an undisturbed stretch to form; opening up every so often to look tears it away and the bleeding starts over.
Breathe through the mouth. If blood goes down the throat, spit it out, do not swallow it — swallowed blood causes nausea and then vomiting.
Once it has stopped: rest, do not blow the nose, do not pick the nose, do not pull off scabs inside it; avoid heavy lifting, exertion, alcohol and hot drinks for the rest of the day. Note which side bled and how many bouts there have been, to tell the doctor.

What you must NOT do

Do NOT tip the head back, and do not lie flat — the blood simply changes direction down the throat, causing choking and vomiting.
Do NOT pack tissue, cotton wool or gauze up the nose — the place that needs pressure is the outside of the soft part of the nose.
Do NOT blow the nose to clear the clot out «to tidy things up» — blowing means bleeding again.
Do NOT stop a blood thinner your doctor has prescribed on your own: that medicine is preventing serious events. But while blood is flowing heavily, do not go on taking it on your own either — get checked now, do not put it off. Remember to count antiplatelet medicines such as aspirin, and long-standing prescriptions as well as what was taken today.
Do NOT buy decongestant nose drops to stop the bleeding on somebody's advice; and do not put leaves or warming oil into a nose that is bleeding.

When you must go to hospital

GO FOR EMERGENCY CARE NOW — call 115 (the emergency number in Vietnam) or go to the nearest medical facility — if: blood is still flowing after you have pinched correctly for a long stretch, and pinching again still does not stop it; blood is pouring out, or the person is choking and vomiting up swallowed blood; the nosebleed followed a knock to the head or the face; the person is faint, pale, sweating, with a fast pulse or laboured breathing; they are on blood-thinning medicine and bleeding heavily; a child under two years old has a nosebleed; they have had a fever for the past few days and now also have bleeding gums, black stools or vomiting of blood. — BE SEEN SOON, the same day if possible and within one to three days at the latest, if: nosebleeds keep coming back in repeated bouts, especially when always on the same side; bleeding starts spontaneously without a knock and lasts unusually long; they are on a blood thinner or already known to have a bleeding disorder; there are signs of anaemia such as pale skin, tiredness, or breathlessness on exertion.

What can be done at home, and what has to go to a facility

Plainly: a nosebleed that will not settle is stopped by nasal packing or by cauterising the bleeding point — that is an ear, nose and throat procedure, done at a medical facility, not at home. If any sign in the box above is present, go in first and call afterwards.

What we can do sits before and after that: advice by video call so you can decide whether to go in or keep watching; a doctor visiting the home to take the history and examine the patient when nosebleeds keep recurring; tests arranged at home if more information is needed; and a review of current medicines so that anything questionable can be put to the prescribing doctor, rather than us changing a prescription.

One note: not every test is best done at home — for many of them, a sample taken at a medical facility gives a more reliable result.

The first-aid steps and the thresholds for emergency care in this article follow the patient materials of the American Academy of Otolaryngology–Head and Neck Surgery (AAO-HNS) — drawn from the Academy's clinical practice guideline — together with the publicly available guidance of the United Kingdom's National Health Service (NHS).

The US CDC has no public first-aid page for nosebleeds, so the CDC material cited above covers only the warning signs of dengue and of a bleeding disorder. This article passes that on and does not replace being examined. Citing CDC here does not imply that CDC endorses Y Te Xanh or our services.

Need personalised advice for your loved one? Call our hotline 094 368 81 15 (24/7) — calling to ask a question or to book costs nothing. GreenCare has doctors who come to examine, nurses who carry out doctor's orders (injections, infusions, dressing changes), remote consultation by video call, and a review of the medicines you are taking; an in-depth remote consultation, or any one after the first, is a paid service. For children we take examination and acute care only — not long-term care at home, and not newborns or expectant mothers. We confirm we have staff in your area and provide transparent pricing before we begin.

Sources

NHS — Nosebleed

Frequently asked questions

How long does a nosebleed have to last before I need to be seen?

The marker worth watching is not a number of minutes but whether you have pinched CORRECTLY. If you have sat down, leaned forward and pinched the soft part of the nose continuously without letting go for a long stretch and blood is still flowing, and pinching again still does not stop it, go for emergency care — do not add more waiting time on top. If you want a specific figure to time yourself against, ask a doctor or a pharmacist — what decides the outcome is still not letting go partway. And if blood is pouring out, if there is choking on blood, if the bleeding followed a knock to the head, or if the person is faint and pale, go straight away without waiting out any stretch at all.

Should I worry about a child who gets nosebleeds often?

Most of the time it is thin nasal lining in a child, combined with nose-picking, dry air or a recent spell of a blocked nose — and it stops with correct pinching. The method in a child is the same as in an adult: sit the child down, lean them forward, pinch the soft part of the nose, have them breathe through the mouth and spit the blood out. But a child under two years old with a nosebleed should be seen, and so should a child with repeated bouts — to find the cause rather than stopping the bleeding each time.

What do I do about a nosebleed while I am on a blood thinner?

Give the same first aid as above, and drop your threshold for being seen very low: heavy bleeding means going now. Do not stop the medicine on your own, because it is preventing serious events such as blood clots; but while the bleeding is heavy, do not go on taking it on your own either — get checked now and do not put it off. The person who adjusts the medicine is the doctor who prescribed it, and they need to know this has happened.

Why does everybody say to tip the head back?

Because tipping the head back stops blood dripping out of the nose, so it looks as though the bleeding has stopped. In fact the blood simply changes direction and runs down the throat: the person swallows it, then feels sick and vomits, and nobody knows how much blood has been lost. The right direction is the opposite — lean the body and head forward, mouth open, and spit out the blood in the mouth. Lying flat has the same problem, so while bleeding, sit rather than lie.

Does it make any difference if the nosebleed is always on the same side?

It does, and that is the reason to see an ear, nose and throat doctor rather than simply stopping the bleeding. Repeated bouts on exactly the same side suggest a particular spot or a particular lesion inside the nose, and only looking inside the nose will show it. The doctor needs to see in there to know where the blood is coming from and why, and only then treat that spot — this cannot be done at home.

Is it worth packing cotton wool or ice up the nose to stop it quickly?

You should not put anything up inside the nose yourself. The place that needs pressure is on the outside, at the soft part of the nose; a plug of cotton wool or tissue pushed up high cannot press on the actual bleeding point, pulling it out easily dislodges the clot, and strands of cotton wool are easily left behind inside. A cool compress on the outside at the base of the nose is fine if it feels comfortable, but the evidence for it is slight and it does not replace pinching the right spot.