Epistaxis is the medical term for a nosebleed. It comes from the Greek word “epistazein,” meaning to drip from above. While the word sounds clinical, the condition is extremely common and usually harmless. More than 90% of nosebleeds originate from the front of the nose, where a dense web of tiny blood vessels sits just beneath the surface of the nasal lining.
Where Nosebleeds Start
The inside of your nose is lined with a thin, moist membrane packed with small blood vessels close to the surface. Most nosebleeds come from a specific spot on the nasal septum (the wall between your two nostrils) called the Kiesselbach plexus, sometimes referred to as Little’s area. This is a network of tiny capillaries and veins that converge in one place near the front of the septum, making it especially vulnerable to irritation and injury.
When these small vessels break, the result is a slow, steady ooze of blood from one nostril. This is what doctors classify as anterior epistaxis, and it accounts for the vast majority of cases. Because the bleeding comes from capillaries or small veins rather than arteries, it tends to stop on its own or with simple pressure.
Anterior vs. Posterior Nosebleeds
A posterior nosebleed originates deeper in the nasal cavity, typically from a branch of a larger artery near the back of the nose. These bleeds are far less common but more serious. Instead of a slow ooze from one nostril, a posterior bleed can produce heavier, faster blood flow that drains down the back of the throat. Posterior nosebleeds are more likely in older adults and people with high blood pressure, and they almost always need professional treatment.
Common Causes
The single most common trigger is dry air. Hot, low-humidity climates, high altitudes, and heated indoor spaces all pull moisture out of the nasal lining, leaving it dry, cracked, and prone to bleeding. Once that tissue is fragile, even a light touch, nose blowing, or a sneeze can rupture the tiny vessels underneath.
Other everyday causes include:
- Nose picking or rubbing, which directly damages the delicate lining
- Upper respiratory infections or sinus infections, where repeated sneezing, coughing, and nose blowing irritate the tissue
- Allergic rhinitis, which keeps the nasal lining inflamed
- Overuse of nasal sprays, particularly antihistamine or decongestant types that dry out the membranes
- Blood-thinning medications like aspirin, ibuprofen, or warfarin, which make bleeding easier to start and harder to stop
- A deviated septum, which creates uneven airflow and dries out one side more than the other
Less common but more serious causes include bleeding disorders like hemophilia or von Willebrand disease, nasal polyps or tumors, liver disease, leukemia, and chronic heavy alcohol use. Pregnancy can also increase nosebleed frequency because blood volume rises and nasal blood vessels expand.
How to Stop a Nosebleed
The correct technique matters more than most people realize, and the instinct to tilt your head back is wrong. Leaning back sends blood down your throat, which can cause nausea or mask how much you’re actually bleeding.
Sit upright and lean slightly forward. Pinch the soft part of your nose (just below the bony bridge) firmly with your thumb and index finger. Hold that pressure continuously for 10 to 15 minutes without checking to see if the bleeding has stopped. Releasing early restarts the clotting process. If it’s still bleeding after the first 15 minutes, pinch again for another 15 minutes. Breathing through your mouth during this time is fine.
When Nosebleeds Need Medical Attention
Most nosebleeds resolve at home within 15 to 30 minutes of steady pressure. A nosebleed warrants urgent medical care if it doesn’t stop despite consistent pressure, if you’re losing a large amount of blood, if it follows a facial injury (especially one that might involve a broken nose), or if blood is flowing heavily down the back of your throat. People on blood thinners who can’t get a nosebleed to stop should seek care sooner rather than later, since these medications impair the body’s ability to form a clot.
Medical Treatments
When home measures aren’t enough, doctors have several options depending on severity. For a visible bleeding point near the front of the nose, the most common approach is cauterization. After numbing the area with a local anesthetic, the doctor applies a chemical (typically a silver nitrate stick) directly to the bleeding vessel to seal it shut. The procedure takes seconds and, while briefly uncomfortable, is effective for most anterior bleeds.
If cauterization isn’t possible or the bleeding is harder to locate, nasal packing may be used. This involves placing a material inside the nostril to apply direct pressure against the bleeding vessel. For patients on blood thinners or those with known bleeding disorders, doctors typically use a dissolvable packing material that breaks down on its own, avoiding the need for a return visit to have it removed. Non-dissolvable packing requires a follow-up appointment and careful instructions about care in the meantime.
For the rare cases where packing and cauterization fail, surgical options exist. These include tying off the specific artery feeding the bleeding area or using a catheter-based procedure to block it from the inside. These interventions are reserved for persistent or recurrent posterior bleeds that resist simpler treatments.
Preventing Recurrent Nosebleeds
If you get nosebleeds frequently, the goal is keeping the nasal lining moist. A saline nasal spray used a few times a day helps, especially during dry winter months or in arid climates. Applying a thin layer of petroleum jelly or a water-based nasal gel just inside each nostril before bed protects the tissue overnight, when air tends to be driest. Running a humidifier in your bedroom adds moisture to the air and reduces the drying effect of indoor heating.
Resist the urge to pick or rub your nose, particularly in the days after a nosebleed, since the healing tissue is fragile and easily re-injured. If you take medications that thin your blood, talk with your prescriber about whether your dose or regimen could be contributing to frequent bleeds.