A bleeding ear is most often caused by a minor scratch to the ear canal, an ear infection, or a ruptured eardrum. Less commonly, it can signal a pressure injury, head trauma, or rarely, a growth in the ear canal. The cause usually becomes clear when you consider what happened right before the bleeding started and what other symptoms you’re experiencing.
Scratches and Minor Injuries
The most common reason for a bleeding ear is simple: something scratched the delicate skin lining your ear canal. Cotton swabs are the usual culprit. Rather than cleaning out wax, they tend to push it deeper while scraping the canal walls. Fingernails, bobby pins, pen caps, and earbuds can all do the same thing. The ear canal’s skin is thin and sits close to bone, so even light contact can draw blood.
These injuries typically produce a small amount of bright red blood, sometimes mixed with earwax. The bleeding usually stops on its own within minutes. If a cotton swab went in deep enough, though, it can reach the eardrum itself and puncture it, which is a more serious injury (more on that below). A good rule: nothing smaller than your elbow should go in your ear.
Ear Infections
Both outer ear infections (sometimes called swimmer’s ear) and middle ear infections can produce bloody discharge. A middle ear infection builds up fluid and pressure behind the eardrum. If that pressure gets high enough, the eardrum can rupture, releasing a mix of pus, mucus, and blood into the ear canal. Ironically, the pain often improves right after a rupture because the built-up pressure is finally released.
Outer ear infections affect the canal itself and can cause swelling, tenderness, a feeling of fullness, and discharge that may be tinged with blood. These infections are commonly caused by bacteria that thrive in moist environments. Swimming, humidity, and anything that traps water in the ear canal increases the risk. In children especially, bloody ear drainage is often the first visible sign that a middle ear infection has progressed to the point of eardrum rupture.
Ruptured Eardrum
A ruptured (perforated) eardrum is one of the more common causes of noticeable ear bleeding and can happen in several ways: infection, a direct blow to the ear, a sudden loud blast like a gunshot, inserting an object too deep, or a pressure change during flying or diving. Symptoms typically include sharp pain that fades quickly, bloody or pus-like drainage, muffled hearing, ringing in the ear, and sometimes dizziness or nausea.
The good news is that most perforated eardrums heal on their own within a few weeks, though some take months. During healing, you’ll need to keep water out of the ear and avoid blowing your nose forcefully. If the hole doesn’t close by itself, a doctor can patch it or, in persistent cases, recommend a surgical repair. Hearing loss from a rupture is usually temporary and improves as the membrane heals.
Pressure Changes (Barotrauma)
If your ear started bleeding during or after a flight, a scuba dive, or even a drive through mountains, barotrauma is the likely cause. When the air pressure outside your ear changes faster than the pressure inside your middle ear can adjust, a vacuum forms. That vacuum pulls extra blood into the tiny vessels lining the ear canal and eardrum. As the pressure difference grows, those engorged vessels can rupture, causing bleeding into or behind the eardrum.
Divers face an additional risk called a “reverse block,” where expanding air gets trapped in the middle ear during ascent and can’t escape through the narrow tube connecting the ear to the throat. This produces the same kind of vessel rupture from the opposite direction. Barotrauma ranges from mild discomfort and muffled hearing to visible bleeding and eardrum perforation, depending on how severe the pressure difference was.
Head Trauma
Bleeding from the ear after a blow to the head is a red flag that needs immediate medical attention. A fracture at the base of the skull, typically caused by high-force impacts like car accidents, falls, or assaults, can cause blood to pool behind the eardrum. The eardrum takes on a purple appearance, a finding called hemotympanum, and this can be visible within hours of the injury.
Other signs of a basilar skull fracture include bruising behind the ear (which may take one to three days to appear), bruising around the eyes, and clear watery fluid draining from the ear or nose. That clear fluid can be cerebrospinal fluid, the liquid that surrounds the brain, and its presence is a medical emergency. Any ear bleeding that follows a head injury, especially with confusion, dizziness, or vision changes, warrants a trip to the emergency room.
Ear Canal Growths
Rarely, chronic or recurring bleeding from the ear without an obvious cause can point to a growth in the ear canal or temporal bone. Squamous cell carcinoma is the most common type, though it is still quite rare overall. These growths tend to develop slowly and produce symptoms that overlap with chronic infection: persistent discharge, bleeding, ear pain, and gradual hearing loss. In some cases, facial weakness on the affected side can develop.
Fair-skinned people in areas with high sun exposure are at somewhat higher risk, since skin cancers on the outer ear can extend inward. Ear canal malignancies are uncommon enough that most doctors won’t suspect one initially, but bleeding that keeps coming back without a clear explanation, or that doesn’t improve with infection treatment, is worth having examined more closely.
What Different Symptoms Tell You
- Small amount of blood after cleaning your ear: likely a canal scratch. Keep the area dry and let it heal.
- Bloody or pus-like drainage with ear pain and muffled hearing: suggests an infection or ruptured eardrum.
- Bleeding during or after flying or diving: points to barotrauma.
- Bleeding after a head injury: possible skull fracture. This needs emergency evaluation, especially if accompanied by confusion, clear fluid drainage, or bruising behind the ears or around the eyes.
- Recurring bloody discharge with no clear trigger: warrants a thorough exam to rule out a growth or chronic condition.
Most ear bleeding resolves without lasting damage, especially when it comes from a minor scratch or a self-healing eardrum perforation. The key distinction is between bleeding you can easily explain (you used a cotton swab, you just flew, you have an active ear infection) and bleeding that appears after head trauma or keeps returning without a clear cause. The first group is usually manageable. The second group benefits from prompt evaluation.