What Causes Hearing Loss?
Hearing loss can happen for many reasons. Sometimes, the cause is straightforward, such as an ear infection or wax buildup. Other times, several small factors combine in ways that make it harder to identify a single explanation.
Common Causes of Hearing Loss
1. Congenital Issues
Some people are born with conditions that affect hearing. These issues may be noticeable in infancy or childhood, but in some cases, the effects don’t appear until later in life.
2. Physical Obstruction
Hearing depends on sound waves traveling freely through the ear canal to the middle and inner ear. If something blocks that pathway—such as earwax, fluid, or a growth—it can cause hearing problems. In many cases, hearing returns once the obstruction is removed.
3. Infections
The ear is sensitive to infections, both in the ear itself and from illnesses that spread to the ear. Severe or repeated infections can damage delicate ear structures and, over time, cause lasting hearing loss.
4. Conductive Hearing Loss
This type of hearing loss occurs when sound can’t move efficiently through the outer or middle ear. Causes may include infections, fluid buildup, growths, or impacted earwax. The good news is that conductive hearing loss is often temporary and may improve once the underlying issue is treated.
5. Sensorineural Hearing Loss
This type involves damage to the tiny hair cells in the inner ear (called stereocilia) or to the auditory nerve itself. These cells normally vibrate in response to sound and send signals to the brain, which translates them into what we hear. Once damaged—most often from aging, noise exposure, or illness—these cells cannot repair themselves, making this form of hearing loss permanent.
A Combination of Factors
Some people experience both conductive and sensorineural hearing loss at the same time, a condition known as mixed hearing loss.