Dried blood in your ear canal usually comes from a minor scratch or irritation to the delicate skin lining the ear canal, often from fingernails, cotton swabs, or earbuds. In most cases, it is not dangerous and heals on its own within a few days. But dried blood can also signal something that needs medical attention, from an ear infection that has progressed to eardrum damage, to pressure injuries, or even rarer conditions like vascular growths. The cause matters because the right response ranges from “leave it alone” to “get to an emergency room.”
The Most Common Culprit Is You
The skin inside your ear canal is thin and sits directly on bone or cartilage with very little cushioning tissue underneath. That makes it easy to nick or scrape with objects that seem harmless. Cotton swabs are the leading offender. A study examining complications of cotton bud use found that injury to the ear canal accounted for about 40% of reported problems, while infection of the canal made up 50%, and eardrum injury the remaining 10%.1CrossRef / Bangladesh Journal of Otorhinolaryngology. Conventional Practice of use of Cotton Bud in External Auditory Canal and it’s Complications A small scratch from a cotton swab might not hurt at the time, but it can ooze a tiny amount of blood that dries into a brownish or dark-red crust you discover hours later.
Earbuds, hearing aids, and even fingernails produce the same kind of superficial damage. If you habitually scratch inside your ear when it itches, that itch-scratch cycle can create repeated tiny wounds. Dried blood from these causes is usually a thin flake or smear, not a heavy deposit, and it tends to appear on the object you used or just inside the opening of the ear canal. It resolves without treatment as long as you stop introducing the thing that caused it.
Ear Infections That Cause Bleeding
An outer-ear infection, sometimes called swimmer’s ear, inflames and swells the canal lining. When that tissue gets angry enough, it can crack or weep fluid that includes a small amount of blood. You would typically also notice pain when you tug on your earlobe, a feeling of fullness, and possibly yellowish or cloudy discharge mixed in with the blood. The dried residue in this case often looks darker or more crusty than a simple scratch because it is a mixture of blood, serum, and sometimes pus.
Middle-ear infections are a different story. When fluid and pressure build up behind the eardrum, the membrane can bulge and, in some cases, rupture. A ruptured eardrum releases the trapped fluid, which may contain blood. The hallmark is sudden pain relief after a period of intense pressure and aching, followed by drainage from the ear. The dried blood you find might be streaked through a watery or mucous discharge rather than appearing as pure blood. In children, who get middle-ear infections far more often than adults, blood-tinged drainage from the ear after a fever and fussiness is a common scenario.
Pressure Injuries From Diving and Flying
Your middle ear is an air-filled space connected to the back of your throat by a narrow tube. When outside pressure changes quickly and you cannot equalize, the pressure difference pushes on the eardrum and the tissues behind it. Scuba diving is the most dramatic example. Research on diving-related ear injuries found that inner-ear barotrauma is commonly associated with hemorrhage behind the eardrum, eardrum perforation, and fluid drainage from the ear.2PubMed Central. Characteristics and Prognostic Analysis in Diving-Induced Ear Trauma and Sudden Hearing Loss Vertigo was reported in 80% of those cases, meaning the injury went well beyond a superficial scratch. Hearing thresholds worsened progressively with depth in that study, which underscores that deeper dives carry higher risk for serious damage.
You do not need to be a diver to experience barotrauma. A rapid descent in an airplane with a head cold, or even forceful nose-blowing, can generate enough pressure to burst tiny blood vessels in the middle ear. The blood pools behind the eardrum in what doctors call a hemotympanum, a visible dark-blue or purple discoloration when someone looks inside the ear. Over time, some of that blood can seep through a small perforation or work its way into the ear canal, where you find it dried. If you recently flew, dove, or had severe sinus congestion and then noticed dried blood along with muffled hearing or dizziness, pressure injury is a strong possibility.
When the Eardrum Tears
An eardrum perforation can happen from trauma (a slap to the ear, an explosion, a cotton swab pushed too deep), from infection, or from the pressure changes described above. The eardrum has a blood supply along its edges, so a tear bleeds. Because the ear canal slopes inward, that blood can pool and dry before you even realize you have been injured. The telltale signs beyond dried blood include a sudden pop or sharp pain, immediate hearing loss on that side, and sometimes ringing.
The good news is that most eardrum perforations heal on their own. A study comparing treatment approaches for large traumatic perforations found that even with no intervention at all, about 79% closed spontaneously, though it took an average of roughly 50 days. Using topical antibiotic drops with a supportive patch pushed the closure rate above 97% and shortened healing to around 13 days.3PubMed Central. Repair of large traumatic tympanic membrane perforation using ofloxacin otic solution and gelatin sponge The practical takeaway is that a perforated eardrum is not automatically a surgical emergency, but seeing a doctor early means faster, more reliable healing and lower infection risk. Until it heals, you need to keep water out of that ear.
Head Injuries and Skull Fractures
Blood coming from the ear after a blow to the head is a red flag. Fractures of the temporal bone, the section of skull surrounding the ear, are a well-recognized consequence of head trauma from falls, car accidents, and assaults. In one study of cranio-facial trauma patients, bleeding from the ear or blood behind the eardrum was the single most common clinical finding, appearing in 49% of cases.4PubMed Central. Temporal Bone Fractures and Related Complications in Pediatric and Adult Cranio-Facial Trauma: A Comparison of MDCT Findings in the Acute Emergency Setting – Section: Results A separate prospective study found active bleeding in the ear canal in 82% of temporal bone fracture patients, eardrum perforation in 22%, and hemotympanum in 40%.5PubMed Central. Evaluation and Outcomes of Hearing Loss in Temporal Bone Fractures: A Prospective Study – Section: Results
The fracture itself can tear the canal skin, rupture the eardrum, or damage the structures of the inner ear. In some cases, it also injures the facial nerve, which runs through a bony channel inside the temporal bone. Hearing loss after such a fracture is common and can be either temporary or permanent depending on whether the damage is to the sound-conducting structures or the nerve itself. If you or someone else notices blood from the ear following any significant head impact, that warrants emergency evaluation, not a wait-and-see approach. The blood may be the most visible sign of deeper injury that imaging needs to assess.
Rare Vascular Growths
Not every cause of dried blood in the ear is acute or traumatic. Glomus tumors are rare, slow-growing, highly vascular masses that arise from specialized nerve tissue near the jugular vein or inside the middle ear.6PubMed Central. Glomus Tumours of the Temporal Bone: Our Experience in a Tertiary Hospital – Section: Abstract Because they have a rich blood supply, they can bleed intermittently into the ear canal. One reported case involved a 33-year-old woman who experienced chronic headache, pulsatile tinnitus with worsening hearing, and recurrent bleeding from the ear before the mass was identified.7PubMed. Ultrasound characteristics of a glomus jugulare tumor
The key symptom that distinguishes a vascular growth from other causes is pulsatile tinnitus, a rhythmic whooshing or thumping sound in the ear that matches your heartbeat. If you hear that alongside unexplained, recurring episodes of blood in the ear, mention both symptoms to your doctor. Glomus tumors are benign in most cases but can cause significant hearing loss and nerve damage as they grow, so earlier detection makes treatment simpler. Other types of ear-canal tumors and even squamous cell carcinoma of the ear canal can also cause chronic bloody discharge, though these are all uncommon.
Foreign Bodies and Polyps
In children especially, an object lodged in the ear canal can sit unnoticed for days or weeks, irritating the canal lining and promoting infection. The body’s response can include forming a fleshy growth called an aural polyp around the foreign object. In one case report, a 19-year-old patient presented with persistent ear discharge and a reddish mass in the ear canal that turned out to be an inflammatory polyp wrapped around a neglected foreign body.8PubMed Central. A surprising finding after external ear polypectomy in a deaf mute patient. That case highlights a broader clinical point: an aural polyp that does not respond to standard treatment should raise suspicion that something is hiding underneath, whether that is a foreign body or chronic middle-ear disease eroding deeper structures.
For adults, aural polyps most often arise from chronic ear infections that have damaged the eardrum or the middle-ear lining. Granulation tissue, which is the body’s attempt to repair a chronically inflamed area, bleeds easily when touched. If you are cleaning your ear and a seemingly small bump bleeds out of proportion to the contact, that tissue is likely granulation or a polyp rather than normal canal skin. Repeated episodes of blood-tinged discharge from the same ear, especially if accompanied by a foul smell, warrant an examination to rule out cholesteatoma, a growth of skin cells behind the eardrum that gradually erodes bone.
How the Color and Amount Tell You Something
Not all dried blood looks the same, and what you see can offer clues. A tiny dark-brown flake on a cotton swab or your fingertip usually points to a superficial scratch. Bright-red blood that you notice on your pillow in the morning, enough to leave a visible stain, suggests something bled actively while you slept, which is more consistent with an infection or a perforation draining. A dark, almost black crust deep inside the canal can indicate older blood that has been sitting for days, possibly from a hemotympanum slowly leaking outward.
Mixed discharge matters too. Blood mixed with clear, watery fluid after head trauma raises concern for cerebrospinal fluid leak, a serious complication of skull-base fractures where the fluid cushioning the brain drains through a crack. Blood mixed with thick, yellow-green pus points toward an infection that has been brewing for a while. And blood mixed with waxy, dark material is often just cerumen (earwax) that picked up a trace of blood from irritated canal skin. If the amount is small, the color is brown, and you have no pain, hearing changes, or dizziness, it is reasonable to monitor for a day or two. Anything beyond that picture deserves professional evaluation.
What Not to Do When You Find It
The instinct when you discover dried blood in your ear is to investigate further, usually by sticking something in there. Resist that urge. If the blood came from a scratch, probing will reopen or worsen it. If it came from a perforated eardrum, you risk introducing bacteria into the middle ear and starting an infection in a space that is normally sterile. And if it came from a growth or polyp, touching it can trigger fresh bleeding.
A few practical guidelines:
- Do not irrigate: Flushing the ear with water or hydrogen peroxide when you do not know the status of the eardrum can push water into the middle ear, causing pain and infection.
- Do not use ear drops: Over-the-counter drops designed for earwax removal contain ingredients that can sting badly on broken skin and are not safe through a perforated eardrum.
- Do not pack the ear: Stuffing cotton or tissue into the canal traps moisture and creates an environment that favors bacterial growth.
- Leave external cleaning gentle: A damp washcloth around the outer ear is fine. Anything inserted into the canal is not.
Earwax removal kits and candling (which is ineffective for any purpose) should be avoided entirely when blood is present. If the dried blood is accompanied by hearing loss, dizziness, pain, or discharge that continues beyond a day, seeing a doctor is the right move. An otoscope exam takes seconds and tells a clinician whether the eardrum is intact, whether there is active infection, and whether further imaging or referral is needed.
Dried Blood That Keeps Coming Back
A single episode of dried blood is usually benign and self-limiting. Recurrent episodes in the same ear change the picture. When blood appears repeatedly without an obvious cause like scratching, the differential shifts toward chronic conditions: a slowly growing polyp, an underlying cholesteatoma, a vascular tumor like the glomus tumors discussed earlier, or chronic otitis media that has eroded the canal or middle-ear structures. Skin conditions such as eczema or psoriasis can also affect the ear canal, causing itchy, cracked skin that bleeds intermittently, though this is usually accompanied by flaking and intense itching rather than frank blood.
People who use blood thinners sometimes notice blood in the ear after minor irritation that would not cause bleeding in someone with normal clotting. The blood thinner does not create the injury, but it makes it bleed more and clot more slowly, so you are more likely to notice the dried residue. If you are on anticoagulant therapy and find dried blood in your ear more than once, mention it at your next appointment. It might just be a scratch that took longer to stop, or it could be a sign that a small lesion in the canal needs attention before it becomes a bigger problem.
Ear-Canal Dermatitis and Eczema
The ear canal is lined with skin, and skin conditions that affect the rest of your body can affect the canal too. Contact dermatitis from earbuds, hearing-aid materials, or even shampoo that gets trapped in the ear is surprisingly common. The irritated skin becomes red, swollen, and itchy. Scratching then causes tiny breaks that bleed. Seborrheic dermatitis and psoriasis can produce flaky, inflamed patches inside the canal that crack and bleed as they dry out. The dried blood in this scenario is typically mixed with dry skin flakes, and you might notice it correlates with flare-ups of the same condition elsewhere on your body, like your scalp, face, or behind the ears.
Treatment for ear-canal dermatitis usually involves identifying and removing the irritant, keeping the canal dry, and using prescription steroid ear drops for a short course to calm the inflammation. Chronic cases sometimes need an allergist to pinpoint the trigger, especially when the culprit is a material in a hearing aid or a specific earbud coating. If you have known eczema or psoriasis and keep finding small amounts of dried blood in your ears, your dermatologist and an ear specialist can work together on a management plan that addresses both the skin condition and the ear-specific irritation.