Conductive hearing loss happens when something blocks sound from traveling through your outer or middle ear to the inner ear. The most common cause in adults is earwax buildup. In children, it is fluid behind the eardrum, often called otitis media with effusion. Unlike sensorineural hearing loss, which involves damage to the inner ear or hearing nerve, conductive loss usually involves a physical blockage or problem in the sound pathway — and many causes are treatable.
Knowing which condition is behind your hearing loss matters. It shapes what your doctor will check, what treatment options make sense, and whether the problem may resolve on its own.
What Does Conductive Hearing Loss Actually Mean?
Conductive hearing loss means sound is not reaching the inner ear efficiently. The inner ear and hearing nerve may be working normally, but something in the outer ear, ear canal, eardrum, or middle ear is reducing how much sound gets through.
Doctors describe the ear in three parts. The outer ear includes the visible ear and the ear canal. The middle ear holds the eardrum and three tiny bones called ossicles that carry vibrations inward. The inner ear contains the cochlea, which turns those vibrations into nerve signals.
Conductive loss points to a problem in the first two sections. Sensorineural loss points to the third. Some people have a mix of both, called mixed hearing loss.
One detail that surprises many people: conductive hearing loss is often described as “mechanical.” That matters because mechanical problems can sometimes be fixed. Removing wax, draining fluid, or repairing a damaged eardrum can restore hearing in ways that inner ear damage usually cannot.
Which Condition Causes Conductive Hearing Loss Most Often?
The answer depends on age. In adults, impacted earwax is the most common cause. In children, middle ear fluid is the leading cause.
Earwax, called cerumen, is normal and protective. Problems start when it builds up and hardens against the eardrum or plugs the canal. This is common and easily overlooked.
Middle ear fluid is different. After an ear infection — or sometimes without one — fluid can stay trapped behind the eardrum for weeks or months. In young children, the tube that drains the middle ear is short and nearly flat, so fluid clears less easily. This is why fluid is so common in kids under school age.
Both conditions block sound in a similar way. Both are also among the most treatable causes of hearing loss.
What Other Conditions Can Cause It?
Many conditions can block or reduce sound transmission. Grouping them by location makes them easier to understand.
Outer ear causes
- Earwax impaction
- An object stuck in the ear canal, common in young children
- Swelling or infection of the ear canal, sometimes called swimmer’s ear
- A narrow ear canal, which can be present from birth or develop later
- Noncancerous bony growths in the canal, called exostoses, often linked to repeated cold water exposure
Middle ear causes
- Fluid behind the eardrum
- Middle ear infection, called acute otitis media
- A hole or tear in the eardrum
- Scarring of the eardrum from past infections
- Problems with the ossicles, including a condition called otosclerosis where one small bone becomes fixed
- Cholesteatoma, an abnormal growth of skin behind the eardrum that can damage middle ear structures
- Trauma, including a blow to the head or a sudden pressure change
Cholesteatoma deserves attention. It is not cancer, but it grows and can erode bone if left untreated. It usually needs surgery. A persistent discharge from one ear, often with a strong smell, is a reason to see a doctor promptly.
How Do You Tell Conductive From Sensorineural Hearing Loss?
You usually cannot tell on your own. An audiologist or ear, nose, and throat doctor can distinguish them with testing.
Some clues point toward conductive loss. People with conductive loss often hear better in noisy settings than in quiet ones. Loud sounds may seem uncomfortably loud rather than faint. Speech may sound muffled, as if ears are plugged.
People with sensorineural loss often have the opposite experience. Background noise makes speech harder to follow, and loud sounds are not bothersome in the same way.
These patterns are clues, not proof. Only formal testing confirms the type and degree of hearing loss.
What Symptoms Go With Conductive Hearing Loss?
Hearing loss is the main symptom, but it rarely appears alone. The accompanying signs often point to the cause.
- A feeling of fullness or pressure in the ear
- Muffled hearing, especially in one ear
- Ear pain or discomfort
- Discharge from the ear
- Ringing or buzzing, called tinnitus
- In children, delayed speech, trouble following directions, or turning up the TV
Children can be easy to miss. A child with fluid behind the eardrum may seem to ignore you, but the child may simply not be hearing clearly. Teachers sometimes notice it before parents do.
In adults, sudden hearing loss in one ear is different. It needs urgent medical attention, ideally the same day. Sudden hearing loss is often sensorineural, but the distinction requires a professional exam.
How Is Conductive Hearing Loss Diagnosed?
Diagnosis starts with a physical exam and a hearing test. Your doctor will look into the ear canal and check the eardrum. Then an audiologist performs a hearing evaluation.
Two tests help separate conductive from sensorineural loss. One is tuning fork testing, done in the office. The other is a full audiogram, which maps hearing across frequencies and compares how sound travels by air versus by bone.
If sound travels better by bone than by air, that pattern suggests a conductive problem. Additional tests, including imaging, may be needed if the cause is not clear.
Can Conductive Hearing Loss Be Treated?
Often, yes. Many causes of conductive hearing loss can be treated, and some resolve on their own.
Earwax can be removed by a clinician. Fluid behind the eardrum often clears without treatment, though it can take time. Middle ear infections may be watched or treated depending on age and severity. A hole in the eardrum may heal or be repaired with surgery. Otosclerosis can sometimes be treated with surgery or a hearing aid.
Hearing aids help many people with conductive loss, even when a cause cannot be fully corrected. Bone conduction hearing devices are another option for certain cases.
Treatment decisions depend on the specific cause, your age, your overall health, and your hearing needs. No single approach fits everyone. A clinician who can examine your ears and review your test results is the right person to guide that decision.
When Should You See a Doctor?
See a doctor if hearing loss is sudden, affects one ear, or comes with pain, discharge, or dizziness. These signs can point to conditions that need timely care.
Also seek care if hearing does not improve after a few weeks, or if a child shows signs of hearing difficulty. Early evaluation matters for children because hearing affects speech and language development.
For adults, gradual hearing changes are easy to dismiss. But a simple exam can rule out something as fixable as earwax. That is worth knowing before assuming the problem is permanent.
Frequently Asked Questions
What is the most common cause of conductive hearing loss?
In adults, impacted earwax is the most common cause. In children, fluid behind the eardrum is the leading cause.
Can conductive hearing loss be cured?
Many causes can be treated or corrected, such as earwax removal, fluid drainage, or eardrum repair. Whether hearing returns fully depends on the specific cause and how long it has been present.
Is conductive hearing loss permanent?
Not always. Some causes, like earwax or fluid, are often temporary and treatable. Others, such as scarring or otosclerosis, may cause lasting loss that can still be managed with hearing aids or surgery.
How do doctors tell conductive from sensorineural hearing loss?
They use a physical exam plus hearing tests that compare how sound travels by air versus by bone. A conductive pattern shows sound reaching the inner ear less efficiently through the outer and middle ear.
