Sudden Hearing Loss: Why Same-Day ENT Assessment Matters

Sudden sensorineural hearing loss is a rapid fall in hearing arising at the inner ear or auditory nerve. A commonly used research definition is a drop of at least 30 dB across three contiguous frequencies within 72 hours. Sudden, meaningful changes that do not meet that exact threshold still deserve prompt assessment because most people do not know their baseline audiogram.

It is usually noticed in one ear: a phone sounds distant on one side, hearing is reduced on waking, or new tinnitus, fullness, or vertigo appears. None of these symptoms alone establishes the diagnosis.

New sudden hearing reduction is itself a reason for same-day assessment. If it accompanies facial weakness or numbness, speech difficulty, double vision, arm or leg weakness, a severe new headache, altered awareness, or inability to walk, use emergency services so neurologic emergencies and stroke can be excluded. Head injury, simultaneous loss in both ears, recurrent attacks, or signs of severe infection also require rapid care.

The first step records the exact onset, one- or two-sided involvement, tinnitus, vertigo or neurologic symptoms, recent infection, trauma, noise, and medication history. Otoscopy looks for conductive causes such as wax, ear-canal disease, eardrum problems, or middle-ear fluid. Tuning-fork tests may give rapid direction; pure-tone audiometry provides formal classification.

AAO-HNS recommends audiometry as soon as possible and within 14 days of symptom onset. Once sensorineural loss is confirmed, MRI or auditory brainstem response (ABR) may be used to assess retrocochlear causes. Routine untargeted head CT and broad routine laboratory panels are not recommended; testing is selected for specific findings in the history and examination.

Treatment combines the type and degree of loss, time from onset, hearing in the other ear, conditions such as diabetes or hypertension, medication risks, and patient preferences. AAO-HNS states that corticosteroids may be discussed as an option within the first two weeks of confirmed sudden sensorineural loss. Intratympanic steroid salvage may be offered for incomplete recovery at two to six weeks. Hyperbaric oxygen is considered only for selected patients and with steroid therapy.

Note the onset time; compare each ear separately; record tinnitus, vertigo, pain, discharge, and neurologic symptoms. Bring your medication list, recent infection, trauma or noise history, and any prior audiograms. Do not self-start steroids, antibiotics, or ear drops, and do not substitute an online hearing screen for prompt examination.

AAO-HNS recommends follow-up audiometry at the end of treatment and within six months after completion. For residual hearing loss, hearing-device options and strategies for localisation and speech in noise can be discussed; persistent tinnitus may benefit from counselling and sound-based support. Rehabilitation is not an alternative that delays acute assessment; it is the next step guided by outcome.