What it is
Sudden sensorineural hearing loss (SSNHL) is hearing that vanishes over hours to a couple of days — usually one ear, sometimes with ringing or fullness. Many people mistake it for wax or congestion and wait. Don't: it's a medical emergency with a treatment clock.
How hyperbaric oxygen helps
The inner ear's hair cells have one of the body's highest oxygen demands and a fragile blood supply. Whatever the trigger, the final insult is oxygen starvation of the cochlea. HBOT raises inner-ear oxygen dramatically, supporting hair cells through the crisis — and clinical guidelines now include it, combined with steroids, within the first two weeks.
What treatment looks like
10–20 daily sessions at 2.0–2.4 ATA, ideally starting within days of onset. Benefit drops sharply after about four weeks.
- Sudden hearing loss? See an ENT or ER today and ask about steroids + HBOT.
- FDA-recognized; coverage varies by plan — we check quickly, because time matters.
The evidence, honestly
Grade A — Strong Evidence
Supported by randomized trials and/or decades of consistent clinical results.
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Hyperbaric oxygen therapy for sudden sensorineural hearing loss: a meta-analysis
JAMA Otolaryngology–Head & Neck Surgery · 2018 · meta analysis
Meta-analysis found HBOT, particularly combined with steroids and started early, was associated with greater hearing recovery in idiopathic sudden sensorineural hearing loss.
Common questions
I noticed hearing loss two weeks ago — am I too late?
No — but you're in the window where every day counts. Guidelines support HBOT up to about four weeks from onset, with better odds the earlier you start. Call us today.
Will my hearing fully return?
Honest answer: results vary. Combined steroid + HBOT treatment meaningfully improves the odds of recovery, especially with early treatment, but no one can promise full restoration.
Educational content, not medical advice — see our medical disclaimer. Last medically reviewed July 2026 by Dr. David Greene, MD.