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Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Hearing loss can result from a blockage in the outer or middle ear, damage to the inner ear, or problems along the auditory pathway. Some causes, such as earwax or an infection, may be treatable; permanent inner-ear loss may be managed with hearing aids or, for some people, cochlear implants. The right next step depends on the cause and how quickly the change happened. Sudden hearing loss—especially in one ear—needs immediate medical assessment.
What can cause hearing loss?
Clinicians often distinguish hearing loss by where sound transmission is disrupted. Conductive loss affects the passage of sound through the outer or middle ear. Sensorineural loss involves the inner ear’s sensory structures or the auditory pathway. Both types can occur together, and symptoms alone cannot reliably identify the cause.
Conductive hearing loss
Sound may be impeded by earwax, fluid, or an infection. A clinician can check for these and may be able to treat the cause directly. Do not assume that a sudden change is wax or congestion without an assessment.
Sensorineural hearing loss
Damage or changes involving the inner ear or auditory pathway can be associated with aging, repeated or extremely loud noise, injury, disease, or certain medicines. More than one factor may contribute. Age-related hearing loss, or presbycusis, generally develops gradually and can make speech harder to follow, particularly in noisy places. Other health conditions, noise exposure, and medicines can also affect hearing over time.
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Noise-related loss may build gradually after repeated exposure or occur immediately after an extremely loud sound, such as a gunshot or explosion. NIDCD says sounds at or below 70 A-weighted decibels (dBA) are unlikely to cause hearing loss even after long exposure; that does not mean every sound above 70 dBA causes damage at every duration. NIDCD also notes that human inner-ear hair cells do not grow back once lost.
Sudden hearing loss
Sudden sensorineural hearing loss (SSHL) is a rapid loss arising in the inner ear, often in one ear. It can appear all at once or over several days and may be accompanied by ear fullness, dizziness, or tinnitus. NIDCD reports that an identifiable cause is found in about 10 percent of diagnosed cases; possible causes include infection, head trauma, autoimmune disease, certain drugs, circulation problems, neurological disorders, and Ménière’s disease.
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When is hearing loss urgent?
Seek medical attention immediately for a sudden hearing change in one or both ears. NIDCD warns that sudden loss can be mistaken for allergies, sinus trouble, or earwax, and that delaying assessment and indicated treatment can make treatment less effective. NHS guidance also advises urgent help for sudden loss or hearing that worsens over days or weeks.
NIDCD reports that about half of people with SSHL recover some or all of their hearing spontaneously, usually within one to two weeks of onset. That possibility is not a reason to wait: prompt assessment is still important because treatment may be time-sensitive.
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How is the cause diagnosed?
A clinician will consider the timing and pattern of the change and examine the ear for a possible conductive cause, such as wax or fluid. For sudden unexplained loss, NIDCD says pure-tone audiometry should be performed within a few days. One clinical sign used in diagnosing SSHL is a loss of at least 30 decibels across three connected frequencies within 72 hours; this is a diagnostic criterion, not a home test. Further tests may be needed to investigate an underlying cause.
For gradual or persistent difficulty, a primary care provider can check for wax, infection, or injury and refer to an otolaryngologist (ENT) or audiologist. An audiologist measures the type and degree of hearing loss and can discuss suitable devices. Assessment matters because the same difficulty hearing can have different causes and call for different treatment.
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Which treatments and supports can help?
| Option | What it can do | Important considerations |
|---|---|---|
| Treatment of an identified cause | A clinician may remove earwax or treat an infection; other conditions may need their own medical management. | What is appropriate depends on the examination and cause. Do not try to diagnose a new or worsening loss from symptoms alone. |
| Corticosteroids for SSHL | NIDCD describes corticosteroids as the most common treatment for sudden deafness, especially when the cause is unknown. | They should be started as soon as possible for the best effect. A clinician decides whether they are suitable and which route to use; injections into the middle ear are an option in some cases. Treatment delayed more than two to four weeks is less likely to reverse or reduce permanent loss. |
| Hearing aids | These devices amplify sound and can improve hearing and speech comprehension for some people with inner-ear loss. | Benefit depends on the type and degree of loss and on whether enough inner-ear hair-cell function remains. Amplification has practical limits. A hearing professional programs prescription devices. |
| Over-the-counter (OTC) hearing aids | In the United States, OTC hearing aids are intended for adults who perceive mild-to-moderate hearing loss. | They are not a substitute for clinical assessment when loss is sudden, one-sided, painful, rapidly worsening, or otherwise complicated. This eligibility description is specific to the United States. |
| Cochlear implants | For selected people with severe or profound hearing loss, an implant can bypass damaged parts of the ear and stimulate the auditory nerve. | Implants require surgery and candidacy assessment, followed by adaptation and therapy. They are different from hearing aids and do not restore normal hearing. |
| Communication supports | Captions, assistive listening devices, reducing background noise, and facing the speaker can make conversations easier to follow. | These strategies can support participation, but they do not treat the cause or replace assessment of new or worsening loss. |
How to choose a hearing technology option
Technology decisions are best made after hearing is assessed, rather than by choosing a device based only on a symptom or product description. Discuss the type and degree of loss, whether one or both ears are affected, communication goals, expected benefit, and any need for follow-up or adaptation.
- Hearing aids: A hearing professional can help match and program prescription devices to the hearing test. US OTC devices are limited to adults with perceived mild-to-moderate loss; more significant or complex cases call for professional guidance.
- Cochlear implants: Candidacy assessment considers the degree of hearing loss and whether the auditory nerve can be stimulated. Surgery and rehabilitation are part of the decision, not optional add-ons.
- Everyday listening supports: Captions and assistive listening devices may help in particular settings, while reducing background noise and facing the speaker can improve access to conversation.
Can hearing loss be prevented?
Protecting the ears around loud sound and reducing exposure can lower noise risk, but prevention measures cannot reverse established hearing loss. Because NIDCD notes that lost human inner-ear hair cells do not grow back, avoid treating hearing protection as a remedy for a change that has already occurred. New or worsening difficulty still warrants assessment.
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