The short answer: Most repeat nosebleeds come from dry, irritated blood vessels at the front of the nose. Dry winter air, colds, allergies, nose picking, hard nose blowing, and nasal sprays are the usual triggers. Blood thinners make bleeds more frequent and harder to stop. See a clinician if bleeds are frequent, happen on one side only, run in your family, or will not stop after 20 minutes of pressure.
Are frequent nosebleeds common?
Yes. The American Academy of Otolaryngology-Head and Neck Surgery (AAO-HNS) clinical practice guideline on nosebleed says at least 60% of people in the United States have a nosebleed at some point. Only about 6% of people with nosebleeds seek medical care for one.
The medical name for a nosebleed is epistaxis. The same guideline says nosebleeds account for about 0.5% of all emergency department visits. Hospital stays for severe nosebleeds are rare, at about 0.2% of patients.
So a nosebleed by itself is rarely a sign of something serious. The pattern matters more than a single episode. Doctors pay attention to how often bleeds happen, whether they come from one side or both, and what else is going on in your health.
Where in the nose does the bleeding start?
Doctors split nosebleeds into two types by where the bleeding starts.
- Anterior (front) nosebleeds. These start on the front part of the nasal septum, the wall of tissue between your two nostrils. A review in American Family Physician says more than 90% of nosebleeds come from the front of the nose. Most can be treated at home or in a clinic.
- Posterior (back) nosebleeds. These start higher or deeper in the nose. MedlinePlus notes they may be harder to control. The same review says posterior bleeds are more likely to need a hospital stay and twice as likely to need nasal packing.
A front nosebleed usually drips out of one nostril. A back nosebleed often runs down the throat as well, even when you lean forward. Heavy bleeding that pours down the back of the throat needs prompt care.
What causes nosebleeds to keep coming back?
The lining of the nose holds many small blood vessels that sit close to the surface. MedlinePlus explains that air moving through the nose can dry this lining. Crusts form, and they bleed when they are picked or bumped. That is why nosebleeds are more common in winter, when indoor air is dry and colds spread.
MedlinePlus lists these common causes:
- Irritation from allergies, colds, sneezing, or sinus problems
- Very cold or dry air
- Blowing the nose very hard, or picking the nose
- Injury to the nose, or an object stuck in the nose (common in children)
- A deviated septum
- Overuse of decongestant nasal sprays, or chemical irritants that are sprayed or snorted
- Oxygen given through a nasal cannula
- Recent sinus or pituitary surgery
- Snorting cocaine or amphetamine
A single weak spot often causes a run of bleeds. Once a vessel bleeds, the scab can break open again over the next days. This creates a cycle that ends once the lining heals and stays moist.
Less common causes deserve a look when the pattern is unusual. Hereditary hemorrhagic telangiectasia (HHT) is an inherited condition that causes fragile, abnormal blood vessels. MedlinePlus Genetics says nosebleeds are very common in HHT. It affects an estimated 1 in 5,000 to 1 in 10,000 people. The AAO-HNS guideline tells clinicians to check for small red vessel spots inside the nose and mouth when a person has repeat bleeds from both sides or a family history of repeat nosebleeds.
Bleeding disorders are another cause. If you also notice easy or unexplained bruising, bleeding gums, or heavy periods, tell your clinician. Rarely, MedlinePlus notes, repeat nosebleeds can be a sign of a tumor of the nose or sinuses. Bleeding from one side only, again and again, is the pattern that most often leads to a closer exam.
Can medications or high blood pressure cause nosebleeds?
Medications are one of the most common reasons nosebleeds become frequent or hard to stop. MedlinePlus names blood thinners such as warfarin, clopidogrel (Plavix), and aspirin as drugs that may cause or worsen nosebleeds. The AAO-HNS guideline tells clinicians to record anticoagulant and antiplatelet use for every patient with a nosebleed.
Do not stop a blood thinner on your own. The guideline advises that, unless bleeding is life-threatening, clinicians should first try standard treatments before reversing or stopping these drugs. Stopping them can raise the risk of stroke or clots.
Nasal sprays matter too. MedlinePlus lists overuse of decongestant sprays as a cause. The MedlinePlus drug page for fluticasone nasal spray lists severe or frequent nosebleeds as a side effect to report to your doctor. If your bleeds started after a new spray, mention it.
High blood pressure is a common question. MedlinePlus says repeat nosebleeds may be a symptom of high blood pressure. But the evidence on cause is mixed. A systematic review of nine studies found that blood pressure is often higher during a nosebleed. The authors said this does not prove high blood pressure causes the bleed, because stress during the episode can raise readings. They noted that the visit can still uncover blood pressure that was already high. If your reading is high during a nosebleed, have it checked again later. For more on readings and targets, see hypertension.md.
How do you stop a nosebleed at home?
MedlinePlus gives these steps to stop a nosebleed:
- Sit down and lean forward. This keeps you from swallowing blood. Breathe through your mouth.
- Pinch the soft part of the nose shut between your thumb and finger.
- Hold firm pressure for a full 10 minutes before you check whether the bleeding has stopped.
- A cold compress across the bridge of the nose may help.
Do not lie down, and do not pack the nose with gauze. Avoid sniffing or blowing your nose for several hours afterward. The AAO-HNS guideline also puts firm, steady pressure on the lower third of the nose first, held for 5 minutes or longer.
To prevent repeat bleeds, MedlinePlus suggests adding moisture to indoor air with a vaporizer. Saline nasal spray and a water-soluble nasal gel can keep the lining from drying out. MedlinePlus notes that a decongestant spray can sometimes help if bleeding persists. Ask a clinician before relying on one, since overuse can itself cause nosebleeds.
When should you see a doctor for nosebleeds?
MedlinePlus advises emergency care if:
- Bleeding does not stop after 20 minutes
- The nosebleed follows a head injury
- Your nose may be broken
- You take blood thinners
- You have had nosebleeds before that needed specialist care
Make a regular appointment if you or your child has frequent nosebleeds, if bleeds are not linked to a cold or other minor irritation, or if they follow sinus surgery. Heavy blood loss with dizziness or a racing heart is an emergency. See our list of red flag symptoms for other signs that need same-day care.
A clinician will look inside the nose to find the bleeding spot. The AAO-HNS guideline recommends nasal endoscopy, a look with a thin camera, for repeat bleeds despite treatment or for repeat bleeds from one side. Tests may include a blood count and clotting tests. Treatment depends on the cause. Options include sealing the vessel (cautery), moisturizing treatments, packing, and, for stubborn cases, procedures to block the artery. An ear, nose, and throat (ENT) specialist handles complex cases.
The bottom line
Frequent nosebleeds are common and usually come from dry, irritated vessels at the front of the nose. Moist air, saline, and less picking or hard nose blowing prevent most repeat bleeds. Blood thinners, nasal sprays, and inherited conditions such as HHT can make bleeds more frequent. See a clinician for bleeds that are frequent, one-sided, heavy, run in your family, or last longer than 20 minutes with firm pressure.
Last updated: October 2026. This article is for informational purposes only and does not constitute medical advice. If you have frequent or heavy nosebleeds, or you take a blood thinner, talk with a qualified clinician.