Sudden Sensorineural Hearing Loss (SSNHL)
A sudden drop in hearing, especially in one ear, should be assessed promptly.
Medically reviewed by a board-certified ENT specialist
- Author:
- Dr. Poj Pinyopornpanish — Otolaryngologist · Thai Board of Otolaryngology
- Medical reviewer:
- Dr. Poj Pinyopornpanish — Otolaryngologist · Thai Board of Otolaryngology
- Reviewed on:
- Last updated:
- Estimated reading time: 4 min
Urgent ear condition
What is sudden sensorineural hearing loss?
Sudden sensorineural hearing loss (SSNHL) is a rapid loss of inner-ear or hearing-nerve function, commonly affecting one ear. It may feel like blocked or muffled hearing and can occur with tinnitus, ear fullness, or dizziness. A blocked sensation is not always earwax. Sudden hearing change warrants prompt ear examination and audiometry because some treatments are time-sensitive.
Symptoms
When to suspect sudden hearing loss
The change may occur at once, over a short period, or be noticed on waking.
Sudden reduction in hearing, especially in one ear
New ear fullness or a blocked-ear sensation without a clear cause
New tinnitus with reduced hearing
Speech or environmental sounds suddenly seem muffled or distorted
Dizziness or imbalance may occur
Assessment
Not every sudden hearing change is SSNHL
An examination helps distinguish conductive problems from inner-ear or hearing-nerve loss.
Earwax or ear-canal problems
Can cause blocked or reduced hearing and may be identified on ear examination.
Middle-ear fluid or inflammation
Can reduce sound conduction and mimic sudden hearing loss.
Inner-ear hearing loss
SSNHL is sensorineural hearing loss that requires timely assessment.
When to seek care
Do not simply wait and see after a sudden hearing drop
Contact a medical service promptly when a new sudden hearing change occurs.
You wake with clearly reduced hearing in one ear
Hearing falls over hours or a few days
Tinnitus or ear fullness occurs with reduced hearing
Dizziness accompanies a hearing change
Facial weakness, arm or leg weakness, speech difficulty, or other neurological symptoms require emergency assessment
Diagnosis
How is SSNHL assessed?
The doctor reviews the timing and associated symptoms, examines the ear canal and eardrum to exclude causes such as wax, infection, or middle-ear fluid, and arranges audiometry to confirm the type and degree of hearing loss. Additional investigation or referral may be recommended when clinical findings indicate it.
Treatment
Treatment is individualized after assessment
Corticosteroids may be considered for SSNHL after assessing timing, potential benefit, contraindications, comorbidities, and treatment risks. Not every patient is suitable for the same medicine or route.
Corticosteroids when indicated
A clinician may consider systemic corticosteroids, including methylprednisolone (Solu-Medrol), for an appropriate patient after reviewing contraindications and risks.
Individual treatment plan
Drug choice, route, dose, and duration depend on the audiogram, symptoms, medical history, and clinician assessment.
Follow-up hearing tests
Repeat audiometry helps document recovery and guide further management.
What to do now
While arranging assessment
Do not delay for several days to see whether a sudden hearing drop resolves on its own.
Note when the hearing change first started
Bring your medication list, medical conditions, and drug-allergy history
Do not self-start oral or injectable steroids
Seek emergency care for associated neurological symptoms
Prevention
SSNHL cannot always be prevented
Many cases have no clearly identified cause, but protecting hearing remains important.
Protect your ears from hazardous noise
Discuss potentially ototoxic medicines with your clinician when relevant
Seek assessment for a new or unexplained hearing change
FAQ
Common questions about sudden hearing loss
Concise answers to common questions people search before an ENT assessment.
How urgent is sudden hearing loss?
Prompt assessment is recommended. AAO-HNS guidance recommends audiometric confirmation as soon as possible and within 14 days of symptom onset, and says clinicians may offer corticosteroids as initial therapy within 2 weeks for appropriate patients. Waiting several days simply to see whether a sudden hearing loss resolves is therefore not advisable.
Is waking with one blocked ear always SSNHL?
No. Wax, middle-ear fluid, and other conditions can feel similar. If hearing has suddenly dropped, ear examination and audiometry help distinguish these causes from SSNHL.
Can Solu-Medrol be used for sudden hearing loss?
Solu-Medrol is methylprednisolone, a corticosteroid. Corticosteroid treatment may be considered in selected patients with SSNHL, but contraindications, comorbidities, timing, and risks must be reviewed by a clinician. It should not be self-administered.
Will sudden hearing loss recover?
Recovery varies substantially between individuals and depends on multiple factors. No treatment can guarantee full recovery; follow-up hearing tests help assess change and guide next steps.
What if I also feel dizzy?
Tell the clinician because dizziness can accompany inner-ear disorders. Facial weakness, limb weakness, speech difficulty, severe headache, or other neurological symptoms require emergency assessment.
References
Related guidelines and patient resources
The sources below are recognized international guidelines and patient-education resources for general learning. They are not individualized medical advice.
Patient information on ear and hearing conditions
AAO-HNS / ENThealth
View source (AAO-HNS / ENThealth)Patient education and clinical guidance in otolaryngology
American Academy of Otolaryngology–Head and Neck Surgery (AAO-HNS)
View source (American Academy of Otolaryngology–Head and Neck Surgery (AAO-HNS))Public ENT health information
ENThealth (AAO-HNS Foundation)
View source (ENThealth (AAO-HNS Foundation))Clinical Practice Guideline: Sudden Hearing Loss (Update)
American Academy of Otolaryngology–Head and Neck Surgery (AAO-HNS)
View source (American Academy of Otolaryngology–Head and Neck Surgery (AAO-HNS))Sudden Sensorineural Hearing Loss (SSNHL)
National Institute on Deafness and Other Communication Disorders (NIDCD)
View source (National Institute on Deafness and Other Communication Disorders (NIDCD))
Educational information
Medical Disclaimer
This information is intended for educational purposes only and does not replace diagnosis or treatment by a qualified physician. If you have concerning symptoms, please consult an ENT specialist.
Related links
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Sudden hearing change?
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