Sudden hearing loss in one ear?
What to do today
Treat a sudden drop in hearing, especially in one ear, as a medical emergency. Seek medical evaluation immediately and arrange urgent diagnostic hearing testing; do not wait for it to clear on its own.
The short answer: treat it as a medical emergency. If your hearing dropped suddenly over a few hours or overnight, seek medical evaluation immediately and arrange urgent diagnostic audiometry. Sudden sensorineural hearing loss (SSNHL) is one of the few true emergencies in hearing care, and clinical guidelines emphasize prompt diagnosis and treatment.
Why this is urgent
Most hearing loss develops slowly over years. Sudden hearing loss is different: it appears within about 72 hours, usually in one ear, and often with no obvious cause. The National Institute on Deafness and Other Communication Disorders (NIDCD) describes it as a condition that should be considered a medical emergency, because treatment, when appropriate, works best when it starts early.
In our clinic, patients often describe it the same way: "I woke up and my ear felt full," or "the phone suddenly sounded dead on one side." A common mistake is waiting a week or two because the change seems like congestion, a blockage, or a lingering cold. Sometimes it is. But the only way to know is to test.
What is a red flag in ENT for sudden hearing loss?
A sudden drop in hearing, especially in one ear, is an urgent red flag. New one-sided ringing or fullness can occur with it. The signs below help explain what to report when you call; they do not replace a diagnostic hearing test.
- One-sided loss: sound is muffled or absent in a single ear.
- New ringing or fullness: tinnitus or pressure that arrived with the hearing change.
- Dizziness or imbalance: the inner ear handles both hearing and balance.
- A sudden drop after illness: hearing that worsened sharply following a virus or infection.
- The "phone test" fails: hold your phone to each ear; a clear difference between sides is a red flag.
What causes it?
In most cases of SSNHL, no single cause is found. Research points to viral inflammation, circulation changes in the inner ear, and immune responses as likely contributors. Sudden loss can also have a simple mechanical explanation, such as a blockage in the outer ear or fluid behind the eardrum. Distinguishing the two is exactly what a diagnostic hearing evaluation is for, and it changes what happens next entirely.
Hours matter more than people think. Early testing protects your options.
How evaluation works at Pinnacle
A diagnostic hearing evaluation takes about 45 to 60 minutes. We examine the ear canal, run pure-tone and speech testing, and determine whether the loss is conductive (a blockage or middle-ear problem) or sensorineural (inner ear or nerve). If the pattern suggests SSNHL, we coordinate a prompt medical referral, typically to an ENT physician, since treatment such as corticosteroids is a medical decision and is most effective early. We cannot promise any specific outcome, but we can make sure you are tested and referred without delay.
We reserve room for urgent cases at both offices, Midtown Manhattan and Garden City, and we offer at-home visits in Manhattan, Brooklyn, Queens, and Nassau County when travel is difficult; a concierge visit fee applies to every appointment. If your hearing changed suddenly, call 646-436-7590 today and tell us; we will prioritize you.
Frequently asked questions
Is sudden hearing loss an emergency?
Yes. Treat a sudden drop in hearing as a medical emergency and seek medical evaluation immediately. The 72-hour period describes how quickly the hearing change may develop; it is not a reason to wait.
Could it be a blockage or congestion?
Sometimes, and that is the good news scenario. A hearing test plus an ear-canal exam tells the difference in one visit. Prompt evaluation matters even when a blockage or congestion seems possible.
Who should I see first, an audiologist or an ENT?
An audiologist can test quickly and identify the type of loss; if results suggest SSNHL, you will be referred promptly for medical treatment.
How fast can I be tested in NYC?
Sudden hearing changes require prompt medical evaluation. Contact us and tell the office that your hearing changed suddenly so the team can direct you to an appropriate next step.
Audiologist or ENT: who does what?
An audiologist measures whether the change is conductive or sensorineural and documents its degree and pattern. An ENT physician evaluates and treats the medical cause. When testing suggests SSNHL, the useful pathway is rapid audiologic confirmation followed by prompt ENT management, not choosing one profession instead of the other.
References
- Sudden Deafness (Sudden Sensorineural Hearing Loss): National Institute on Deafness and Other Communication Disorders (NIDCD), NIH
- Clinical Practice Guideline: Sudden Hearing Loss (Update): American Academy of Otolaryngology–Head and Neck Surgery
- Sudden Sensorineural Hearing Loss (SSNHL): Cleveland Clinic
- Hearing Loss: Symptoms and Causes: Mayo Clinic
- Hearing Loss and Hearing Health: American Speech-Language-Hearing Association (ASHA)
About the reviewer: Dr. Eric G. Nelson, Au.D., CCC-A, is a board certified Doctor of Audiology, founder and clinical director of Pinnacle Audiology, and a former audiology supervisor at Weill Cornell Medicine. This article is educational and is not a substitute for individual medical advice.
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