Sudden Sensorineural Hearing Loss (SSHL): What You Need to Know
Sudden sensorineural hearing loss (SSHL) is a rapid decrease in hearing, usually affecting one ear. It can develop over hours or days. SSHL can affect adults of any age, however it most commonly occurs in people in their late 40’s or early 50’s.
Unlike gradual hearing loss, SSHL is sudden and obvious. You might find that sounds are suddenly muffled or notice a sudden change when using the phone on one side. Other symptoms, such as a feeling of fullness in the ear, dizziness, or ringing (tinnitus), may also appear.
In this article, we’ll break down what sudden hearing loss is, explore common causes and key symptoms, explain how clinicians diagnose it, discuss when to seek urgent care, and outline the most effective treatments and hearing protection strategies.
Key Takeaways
- Sudden sensorineural hearing loss (SSHL) is a sudden, rapid loss of hearing in one ear that can happen over hours or a few days, and it often comes with symptoms like tinnitus, fullness, or dizziness.
- Seeking medical attention immediately is critical because early treatment is typically far more effective and can greatly improve the chances of recovering your hearing.
- Multiple factors can trigger SSHL, including viral infections, circulation problems, autoimmune responses, trauma, or certain medications, therefore identifying possible causes helps guide treatment.
- Even mild or partial hearing changes should never be ignored, because acting quickly can prevent permanent hearing loss.
- Protecting your hearing and monitoring it over time is important to prevent further damage and support long-term ear health.
What is Sudden Sensorineural Hearing Loss (SSHL)
SSHL is a type of sensorineural hearing loss, which means it involves the inner ear or the nerve pathways that connect the ear to the brain. This is different from conductive hearing loss, which is caused by blockages or damage in the outer or middle ear.
Most cases of sudden sensorineural hearing loss affect only one ear, and the hearing loss can range from mild to severe. Sometimes, the condition is accompanied by tinnitus or balance issues.
Common Causes
SSHL can be triggered by a variety of underlying factors. In some cases, a clear issue is identified, while in others, the exact reason may be uncertain. Even so, understanding the most common contributors can help explain why SSHL happens and why immediate treatment matters.
Viral Infections
Viral infections are one of the most frequently suspected cases. Certain viruses can affect the inner ear or the auditory nerve, leading to inflammation that interferes with sound signals travelling to the brain. These infections may occur on their own or following a cold, flu, or upper respiratory illnesses.
Circulation Problems
Circulation problems can also play a role. The inner ear relies on a steady supply of oxygen-rich blood to function properly. If there is reduced blood flow, the sensitive inner ear structures can be damaged and result in sudden hearing loss. This can be linked to cardiovascular conditions, clotting issues, or sudden changes in circulation.
Autoimmune Disorders
Autoimmune disorders are another possible cause. In these cases, the body’s immune system mistakenly attacks the cells of the inner ear, leading to inflammation and rapid hearing changes. SSHL related to autoimmune activity may occur suddenly or fluctuate over time.
Head Trauma or Injury
Head trauma or injury can disrupt the delicate structures of the inner ear or damage the auditory nerve. Even injuries that seem mild at first can sometimes trigger sudden hearing changes days later.
Certain Medications
Some medications are known to be ototoxic, meaning they can cause damage to the inner ear. These medications may affect hearing suddenly or worsen existing vulnerabilities, especially in those that may be more sensitive to their effects.
It’s important to note that SSHL can still be treated effectively even when a specific cause isn’t identified. Early evaluation and treatment remain the most important factors in recovering sudden hearing loss, regardless of the underlying trigger.
Symptoms to Watch For
Sudden sensorineural hearing loss (SSHL) often appears without warning and can progress quickly, sometimes just over a few hours. Because the changes can be subtle at first, it’s important to pay attention to any sudden differences in your hearing.
One of the most common signs is rapid hearing loss in one ear. You may notice that sounds seem muffled, distant, or completely absent on one side, or realize it when using the phone or wearing earbuds.
Many people with SSHL also experience ringing, buzzing, or humming in the ear, also known as tinnitus. This sound may be constant or intermittent and can range from mild to bothersome.
A feeling of fullness or pressure in the affected ear is another common symptom. This sensation can sometimes be mistaken for congestion, or fluid buildup, which is why SSHL is occasionally overlooked in the early stages.
Some people may also experience dizziness, vertigo, or balance problems, as the inner ear plays a role in both hearing and balance. These symptoms can vary in severity and may come and go.
If you notice any of these symptoms, do not wait to see if they will resolve on their own. Immediate evaluation by a hearing professional or urgent care is essential, as early treatment offers the best chance for hearing recovery.
When to See a Doctor
SSHL is considered a medical emergency. Experts recommend contacting an audiologist or ENT as soon as possible, ideally within 24-48 hours of noticing symptoms. Do not assume that it will resolve on its own, even if the loss seems mild. Rapid assessment allows doctors to start treatments that are most effective in the critical first days.
Diagnosis and Treatment Options
Clinicians will usually perform:
- A hearing test to measure the severity of the loss
- Physical examination of the ear
- Imaging or lab tests if underlying causes are suspected
Treatment may include:
- Oral or injected corticosteroids to reduce inflammation in the inner ear
- Antiviral medication if a viral infection is suspected
- Hyperbaric oxygen therapy in select cases
- Follow-up care with hearing tests to monitor recovery
Early treatment is the most important factor in recovery, and many people regain partial or full hearing with timely care.
Tips for Protecting Your Hearing
Even after recovery, it’s important to protect your hearing:
- Avoid excessive or loud noise and use hearing protection when needed
- Monitor your hearing regularly, especially if you’ve experience SSHL once
- Manage overall health factors, such as blood pressure, diabetes, and stress, which can affect inner ear health
- Follow your clinicians’ recommendations for hearing aids or therapy if some hearing loss remains
Next Steps
If you or someone you care about experiences sudden hearing changes, especially in one ear, the most important step is to act quickly. Contact a hearing professional or medical provider right away for an evaluation.
Even if symptoms improve or seem mild, follow up with a professional to ensure your hearing is properly assessed and monitored. Staying informed, listening to your body, and seeking timely care are the best ways to protect your hearing health and move forward with confidence.
References:
National Institute on Deafness and Other Communication Disorders (March 2018). Sudden Deafness. https://www.nidcd.nih.gov/health/sudden-deafness
Hearing Loss Association of America (n.d.). Sudden Deafness. https://www.hearingloss.org/understanding-hearing-loss/types-causes-and-treatments/sudden-deafness/
Healthy Hearing (2, December 205). What is sudden hearing loss and why does it happen? https://www.healthyhearing.com/report/52462-Sudden-hearing-loss-getting-to-the-bottom-of-it
Canadian Academy of Audiology (n.d.). Sudden Deafness. https://canadianaudiology.ca/wp-content/uploads/fact-sheets/SuddenDeafness.pdf
