You're going about your day when you feel that warm trickle, look down, and see blood. A nosebleed can be alarming, especially if it seems to come out of nowhere. The good news: most nosebleeds are harmless, easy to stop, and traced back to a handful of everyday causes.
Nosebleeds are also incredibly common. Up to 60% of people experience one at some point in their lives, yet only about 6% ever need medical care. Here's what's actually going on inside your nose, and when a bloody nose is worth a closer look.
What Causes Nosebleeds? The Short Answer
The most common causes of nosebleeds are nose-picking, forceful nose-blowing, a bump or injury to the nose or face, and dry air that cracks the delicate lining inside your nose. The inside of your nose is lined with fragile blood vessels that sit very close to the surface, so it doesn't take much to nick one and start bleeding.
Roughly 90% of nosebleeds are what doctors call anterior nosebleeds, meaning they start near the front of the nasal septum (the wall between your nostrils) in an area rich with tiny blood vessels. These are the everyday, easy-to-stop kind. A smaller share, about 5 to 11%, are posterior nosebleeds that begin deeper in the nose and tend to be heavier and harder to control.
Everyday Triggers Behind Most Nosebleeds
Most nosebleeds trace back to something that irritates or dries out the nasal lining. The usual suspects include:
- Dry air: Low-humidity climates, high altitude, and especially heated indoor air in winter dry out and crack the nasal membrane.
- Nose-picking and forceful blowing: Both can scratch or rupture the fragile vessels near the front of the nose.
- Trauma: A bump, knock, or impact to the nose or face.
- Colds, sinus infections, and allergies: Congestion, inflammation, and repeated blowing leave the lining swollen and prone to bleeding.
- Nasal sprays: Overusing antihistamine or decongestant sprays, or steroid sprays, can irritate the membrane.
- Inhaled irritants: Chemical fumes or recreational drug inhalation can damage the lining.
Who Is Most Likely to Get Nosebleeds?
Anyone can get a nosebleed, but they aren't spread evenly across age groups. Nosebleeds follow what's called a bimodal pattern, peaking in children younger than 10 and again in adults aged 70 to 79.
Certain factors also raise your risk. You may be more prone to nosebleeds if you fall into one of these groups:
- People taking blood thinners, including aspirin, NSAIDs, or warfarin
- People with clotting or blood vessel disorders such as hemophilia
- Pregnant individuals, whose nasal blood vessels expand
- People with uncontrolled high blood pressure
- Children roughly 2 to 10, and older adults whose vessels and clotting slow with age
How to Stop and Prevent Nosebleeds
For a typical nosebleed, sit upright, lean slightly forward (not back), and pinch the soft part of your nose just below the bony bridge. Hold steady, breathe through your mouth, and keep the pressure on for several minutes without peeking. Leaning forward keeps blood from running down your throat.
Prevention is largely about keeping that nasal lining moist and intact. Measures that help include:
- Using a saline nasal spray 2 to 3 times daily to keep the membrane hydrated
- Running a humidifier in your bedroom at night, especially in winter
- Applying a thin layer of nasal ointment, such as petrolatum, inside the nostrils
- Avoiding forceful nose-blowing and resisting the urge to pick
- Treating allergies and congestion so you're not constantly irritating the lining
When to See a Doctor About a Nosebleed
Most nosebleeds stop on their own and need nothing more than patience. But some warrant medical attention. Seek care, or in serious cases emergency help, if any of the following apply.
Persistent, heavy, or recurring nosebleeds can occasionally signal an underlying issue, such as a clotting disorder, a structural problem like a deviated septum, or rarely a condition affecting the blood vessels. A clinician can pinpoint the source and recommend the right treatment.
- Bleeding that won't stop after 15 to 20 minutes of steady pressure
- A nosebleed following a significant injury or car accident
- Heavy bleeding, trouble breathing, or feeling faint or weak
- Frequent nosebleeds that keep coming back
- Nosebleeds in someone on blood thinners or with a known clotting disorder
Medical Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider before starting any new skincare treatment, especially if you have underlying health conditions, are pregnant, or are taking medications.
