Can Concussions Cause Nosebleeds? What to Do Next

A concussion by itself does not cause a nosebleed. The brain injury that defines a concussion happens deep inside the skull, and there is no direct pathway from a bruised brain to a bleeding nose. What actually happens in most cases is simpler: the same impact that shakes the brain hard enough to cause a concussion also strikes the face or nose hard enough to rupture blood vessels in the nasal lining. The two injuries are companions of the same blow, not cause and effect. That said, a nosebleed appearing after a head injury can occasionally point to something more dangerous than a simple concussion, which is why it deserves attention rather than a shrug.

Why Nosebleeds and Concussions Show Up Together

The nose sits right in the middle of the face, directly in front of the skull. Any force that strikes the head from the front or the side can easily do two things at once: jolt the brain inside the skull (concussion) and damage the delicate blood vessels lining the nasal passages (nosebleed). Falls, car crashes, sports collisions, and being hit in the face all deliver the kind of blunt force that commonly produces both injuries in the same event. A study of 100 patients admitted to a UK trauma center with facial injuries found that 40 percent had evidence of concussion alongside their facial trauma, yet only about one in ten of those concussion cases had been formally documented with head-injury advice.

This overlap matters because it is easy to get distracted by the visible problem. A bloody nose is dramatic and obvious. A concussion is invisible and can be subtle at first. If someone takes a blow to the face and starts bleeding from the nose, the natural instinct is to deal with the bleeding and assume the person is fine once it stops. But the same force that broke capillaries in the nose may have also rattled the brain, and concussion symptoms like confusion, headache, dizziness, and nausea can take minutes or hours to become apparent.

When a Nosebleed After a Head Injury Is a Red Flag

Most post-trauma nosebleeds are straightforward. Blood vessels in the nose are fragile and close to the surface, and even a moderate bump can make them bleed. This kind of bleeding usually stops on its own within ten to twenty minutes with simple pressure. The concern arises when the nosebleed follows a harder impact and appears alongside other symptoms, because it can signal a fracture at the base of the skull.

The skull base is the bony floor that separates the brain from the nasal passages, sinuses, and ear canals. A fracture here can tear small blood vessels and allow blood to drain into the nose or ears. In one reported case, a bicyclist struck by a car at high speed sustained extensive fractures of the frontal and sphenoid sinuses, presenting with such brisk nasopharyngeal bleeding that he needed to be intubated to protect his airway.

Research on children with mild head injuries sheds light on how nosebleeds can predict more serious underlying damage. In a study of pediatric patients, about 22 percent presented with ear or nosebleed (or cerebrospinal fluid leaking from the nose or ears), and that symptom was statistically associated with abnormal findings on CT scans, including skull fractures and brain swelling. The most common abnormality was skull fracture, found in about 35 percent of those with abnormal scans.

This does not mean every nosebleed after a bump on the head requires a CT scan. It means that clinicians treat a nosebleed as one piece of a puzzle. Combined with other findings like loss of consciousness, persistent vomiting, or clear fluid draining from the nose, it raises the index of suspicion that imaging is warranted.

Clear Fluid From the Nose Is Not a Nosebleed

One thing that trips people up is confusing a watery, clear nasal discharge with a simple nosebleed. After a significant head injury, clear fluid dripping from the nose could be cerebrospinal fluid, the liquid that cushions the brain and spinal cord. A skull base fracture can tear the membranes that contain this fluid, allowing it to leak through the nose. This is called CSF rhinorrhea, and it is a medical emergency because it creates a direct path for bacteria to reach the brain, raising the risk of meningitis.

The classic way to distinguish CSF from ordinary nasal mucus is to look at what is dripping. CSF is thin and watery, often described as having a salty taste if it runs to the back of the throat. When mixed with blood on a white surface like a pillowcase or gauze, CSF produces a “halo sign,” a clear ring that spreads around the central bloodstain. This is not a foolproof test, and any suspicion of CSF leakage after head trauma warrants an emergency room visit. The pediatric study noted above found that nosebleed and CSF otorrhea/rhinorrhea together were among the symptoms most associated with abnormal brain imaging results.

What to Do Right After a Head Injury With a Nosebleed

If someone takes a blow to the head and their nose starts bleeding, handle both problems simultaneously. For the nosebleed, have the person sit upright and lean slightly forward so blood drains out rather than down the throat. Pinch the soft part of the nose firmly and hold it for at least ten minutes without releasing to check. Swallowing blood can cause nausea and vomiting, which is unhelpful when you are also trying to assess someone for a concussion.

While managing the bleeding, watch for concussion symptoms. These include headache, confusion or feeling “foggy,” dizziness, sensitivity to light or noise, difficulty concentrating, nausea, and balance problems. If the person lost consciousness even briefly, that is significant. Do not let the person fall asleep unmonitored for the first few hours, and do not give aspirin or ibuprofen for pain, as these thin the blood and can worsen both the nosebleed and any internal bleeding. Acetaminophen is a safer choice for headache in this situation.

Seek emergency medical attention if any of the following occur:

Bleeding won’t stop: The nosebleed continues beyond 20 minutes of steady pressure.
Clear fluid: Watery, non-bloody fluid drains from the nose or ears.
Worsening symptoms: Confusion deepens, the person becomes increasingly drowsy, speech slurs, or one pupil is larger than the other.
Repeated vomiting: More than one or two episodes of vomiting after the injury.
Seizure: Any seizure activity, no matter how brief.
Blood behind the ear: Bruising behind the ear (called Battle’s sign) or around both eyes (raccoon eyes), which suggests a skull base fracture.

Delayed Nosebleeds Days or Weeks After Head Trauma

A nosebleed that shows up not at the time of injury but days or weeks later deserves extra caution. Delayed post-traumatic nosebleeds are a recognized phenomenon caused by changes in blood vessel walls that take time to develop. When an artery is damaged by blunt force, the vessel wall can weaken and balloon outward, forming what is called a pseudoaneurysm. This weakened pocket of artery wall can eventually rupture, causing sudden and sometimes massive bleeding through the nose.

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These vascular injuries are rare but serious. One documented case involved a 35-year-old woman who developed recurrent massive nosebleeds and lost vision in one eye over six months following a car accident. Imaging revealed a pseudoaneurysm of her internal carotid artery that had formed at the site of a skull base fracture.

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A related type of vascular injury, the traumatic intracranial aneurysm, poses a detection challenge. Research has shown that only about half of these aneurysms are detectable on imaging performed on the day of injury. They can take time to “mature,” meaning the vessel wall damage evolves over days. Because bleeding from these aneurysms often occurs within two weeks of the initial trauma, clinicians sometimes recommend repeat imaging for patients who had skull base fractures near major blood vessels, even if the first scan looked normal.

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The practical message: if you had a significant head injury and start getting unexplained nosebleeds days or weeks later, do not chalk it up to dry air or allergies. Get it checked, especially if the bleeding is heavy or recurrent.

Sports Concussions and Nosebleeds

Contact sports are one of the most common settings where concussions and nosebleeds occur together. A basketball elbow to the face, a soccer collision, a football tackle, a hockey check into the boards: all can deliver force to both the brain and the nasal structures at the same time. Youth sports are a particular concern because children’s skulls are thinner and their brains are still developing, making them more vulnerable to both injuries.

In these settings, the nosebleed is usually treated on the sideline while the concussion goes unrecognized. The facial trauma study cited earlier underscored this pattern: even in a hospital setting, the majority of concussion cases accompanying facial injuries were not formally identified or documented with appropriate follow-up advice.

The takeaway for coaches, parents, and athletic trainers is that a nosebleed from a blow to the head should trigger a concussion screening, not just first aid for the bleeding. If the athlete took a hit hard enough to break blood vessels in the nose, that same hit may have been hard enough to cause a brain injury. Current sports concussion protocols call for removing the athlete from play and conducting a standardized assessment before allowing return. A nosebleed from a head impact should be considered grounds for initiating that assessment, even if the athlete insists they feel fine.

Children and Nosebleeds After Head Bumps

Kids fall constantly, and head bumps with nosebleeds are an everyday occurrence in pediatric emergency rooms. Most of the time, a toddler who trips and hits their face on the coffee table has a simple nosebleed and no brain injury at all. But the pediatric data suggest that when certain symptoms cluster together, the situation deserves closer evaluation.

In the pediatric head-injury study, vomiting was the most common symptom, occurring in nearly 44 percent of cases, followed by visible abrasions on the head or face. Loss of consciousness occurred in about 32 percent. Nosebleed or ear bleed (with or without CSF leakage) occurred in roughly 22 percent of the children, and among all symptoms examined, it was the one with the clearest statistical link to abnormal CT findings.

For parents, the decision of when to seek emergency care after a child bumps their head and gets a nosebleed hinges on context. A low-speed fall from standing height onto a carpeted floor is very different from a child being hit by a ball or falling off playground equipment onto concrete. The mechanism of injury matters. If the fall was from a significant height, involved a high-speed impact, or if the child lost consciousness, vomited more than once, seems unusually sleepy, or is difficult to console, an emergency evaluation is warranted. A nosebleed alone after a mild bump rarely requires imaging, but a nosebleed plus any of those other features changes the risk profile.

How Severe Post-Traumatic Nosebleeds Are Treated

Most nosebleeds after head trauma stop with pressure and time. When they do not, or when they recur with dangerous intensity, medical intervention escalates. The first step in a hospital setting is nasal packing, where gauze or an inflatable device is placed inside the nose to apply direct pressure to the bleeding site. If packing fails, or if the bleeding is coming from a deeper source like a damaged artery near the skull base, more advanced approaches are needed.

Embolization is one such approach. A catheter is threaded through a blood vessel, usually starting at the groin, and guided up to the bleeding artery. Tiny particles or coils are then injected to block the vessel and stop the flow. A two-center study of patients who underwent embolization for severe nosebleeds found the procedure to be both safe and effective.

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For the vascular injuries described earlier, pseudoaneurysms and traumatic aneurysms near the skull base, embolization or surgical repair is often the definitive treatment. In the case of the woman with the carotid pseudoaneurysm draining into her sphenoid sinus, for example, blocking the feeding vessel was the only way to prevent life-threatening recurrent hemorrhages.

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People on Blood Thinners Face Higher Stakes

If you take anticoagulants or antiplatelet medications (warfarin, apixaban, rivarelbaan, clopidogrel, or even daily aspirin), a nosebleed after a head injury is more concerning on two fronts. First, the nosebleed itself will be harder to stop because your blood’s ability to clot is impaired. Simple pressure may not be enough, and you may need medical packing sooner. Second, and more critically, these medications increase the risk of bleeding inside the skull after a head injury. A person on blood thinners who hits their head hard enough to cause a nosebleed should be evaluated in an emergency department, even if the nosebleed stops and they feel fine. The internal bleeding risk is what matters, and symptoms of intracranial hemorrhage can be delayed by hours.

This is one area where the standard advice to “wait and see” does not apply. The threshold for seeking emergency care should be lower, not higher, for anyone on anticoagulation therapy who sustains a head impact.

Nosebleeds Without Head Trauma in Concussion Recovery

Some people recovering from a concussion report getting nosebleeds in the days or weeks afterward, even without a second impact. This causes understandable anxiety, but it usually has a mundane explanation. Concussion recovery often involves headaches, and people commonly take medications or use nasal sprays that can dry out or irritate the nasal lining. Straining from nausea or vomiting can raise blood pressure in the face temporarily. Spending more time lying down or sleeping in dry, climate-controlled rooms can also dry out nasal membranes and make spontaneous nosebleeds more likely.

That said, any new nosebleed during concussion recovery that is heavy, recurrent, or accompanied by worsening neurological symptoms like increased confusion, new visual changes, or severe headache should be reported to a doctor. The delayed vascular injuries discussed earlier, though rare, are a reason to take unexplained post-trauma nosebleeds seriously rather than assuming they are coincidental.

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PubMed Central. Concussion in facial trauma patients: a retrospective analysis of 100 patients from a UK major trauma centre
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Europe PMC. Traumatic epistaxis: Skull base defects, intracranial complications and neurosurgical considerations
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PubMed Central. Correlation of clinical features with neuroimaging in children with mild head injury
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The Egyptian Journal of Otolaryngology. Delayed post-traumatic intractable epistaxis due to pseudoaneurysms in concha bullosa: a case report
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BMJ Case Reports. Post-traumatic pseudoaneurysm of internal carotid artery: a cause of intractable epistaxis
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PubMed Central. Delayed massive epistaxis from traumatic intracranial aneurysm after blunt facial injury
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PubMed Central. Embolization for the treatment of intractable epistaxis: 12 month outcomes in a two centre case series