What Causes a Nosebleed?

The lining of the nose contains a dense network of small, delicate blood vessels that sit very close to the surface — which is exactly why they bleed so easily. A nosebleed can be triggered by a direct blow or fall, forceful nose-blowing or picking, breathing dry air for long periods, sinus infections, or underlying conditions such as high blood pressure or a blood-clotting disorder. In most cases a nosebleed looks worse than it actually is, and the first step is simply to stay calm and reassure the person affected.

Step-by-Step First Aid for a Nosebleed

If the nosebleed is not linked to a more serious head injury, it can almost always be controlled with steady, correct first aid:

1. Sit the person up and lean forward

   Have them sit down and tilt the head slightly forward — never backward. This keeps blood from running down the throat, which can cause choking or nausea.

2. Loosen tight clothing

   Loosen any collar, tie, or clothing around the neck to help the person breathe comfortably and stay calm.

3. Let them spit out any blood

   Encourage the person to spit out blood or saliva rather than swallow it — swallowing can irritate the stomach and trigger nausea or vomiting.

4. Pinch the soft part of the nose

   Using thumb and forefinger, pinch the soft, lower part of the nostrils firmly for 5 to 10 uninterrupted minutes while breathing through the mouth. Continuous pressure compresses the bleeding vessels and is the single most effective step.

5. Apply a cold compress

   Place an ice pack or a cloth-wrapped bag of frozen vegetables across the bridge of the nose. The cold constricts blood vessels and helps slow bleeding further.

6. Check for related injuries

   If the nosebleed followed a blow to the head, watch for dizziness, confusion, or loss of consciousness. Call for emergency medical help immediately if any of these appear.

7. Rest and avoid strain afterward

   Once bleeding stops, the person should avoid blowing their nose, bending over, or heavy exertion for at least 60 minutes to prevent the bleeding from restarting.

Quick Reference: Do’s and Don’ts

When to Seek Emergency Medical Care

Call for professional help right away if any of the following apply:

• The nosebleed continues for more than 30 minutes despite first aid
• The injured person appears faint or lightheaded
• The nosebleed follows an accident, fall, or head injury — including a punch to the face that may have fractured the nose

If the bleeding is severe, recurrent, or linked to a known condition such as high blood pressure or a clotting disorder, it may require advanced medical treatment beyond first aid. When in doubt, always err on the side of professional care.