Sudden Hearing Loss: An ENT Emergency That Requires Prompt Treatment 

Sudden hearing loss (also known as sudden sensorineural hearing loss) is a rapid decrease in hearing that occurs within 72 hours, sometimes noticed immediately upon waking up. This condition is considered a medical emergency because early treatment plays a critical role in the patient’s chance of hearing recovery. 

What Is Sudden Hearing Loss? 

Sudden hearing loss refers to a rapid decline in sensorineural hearing, ranging from moderate to severe, and typically affects one ear, except in some cases related to medication. 

Patients may experience mild hearing reduction, severe hearing impairment, or even complete hearing loss. 

In addition to hearing loss, symptoms may include: 

  • Tinnitus (ringing in the ear) 
  • Dizziness or vertigo 
  • A feeling of fullness in the ear or loss of balance 

Unlike chronic hearing loss, sudden hearing loss develops rapidly and is considered an urgent medical condition that requires prompt evaluation and treatment. 

Causes of Sudden Hearing Loss 

In most cases, the exact cause cannot be identified. Only about 10% of patients have a clearly identifiable cause, such as: 

  • Viral infections: mumps, chickenpox, shingles, HIV, influenza, measles 
  • Vascular diseases: hypertension or blood clotting disorders 
  • Ear trauma: eardrum rupture, inner ear fluid leakage, temporal bone fracture, or ossicle dislocation 
  • Toxic exposure: aminoglycoside antibiotics, alcohol, or tobacco 
  • Metabolic disorders: diabetes, lipid disorders, or hypothyroidism 
  • Autoimmune diseases: such as systemic lupus erythematosus 
  • Auditory nerve damage: acoustic neuroma or nerve inflammation 
  • Psychological or neurological factors: anxiety, depression, or prolonged stress 

How Is Sudden Hearing Loss Treated? 

According to current medical recommendations, treatment for idiopathic sudden hearing loss (when the cause is unknown) usually involves a combination therapy that may include: 

  • Corticosteroids 
  • Medications that improve blood circulation 
  • Drugs to relieve tinnitus or allergic symptoms 
  • Vitamin B supplements 
  • Sedatives when necessary 

The Role of Corticosteroids 

Corticosteroids are the most commonly used and important treatment for sudden hearing loss. They may be administered as: 

  • Oral medication 
  • Intravenous injection 
  • Injection directly into the middle ear 

Studies have shown that intratympanic steroid injections can be as effective as oral treatment. 

Steroids should be started as early as possible, even when sudden hearing loss is only suspected and before all test results are available. If treatment is delayed beyond 14 days, the chance of hearing recovery decreases significantly, and permanent hearing loss may occur. 

Treatment Based on the Underlying Cause 

When a specific cause is identified, additional treatments may be provided: 

  • Antibiotics if infection is present 
  • Antiviral medications if related to viral infections 
  • Stopping or changing medications that may be toxic to the ear 

For patients with severe hearing loss that does not respond to treatment, doctors may recommend: 

  • Hearing aids 
  • Cochlear implants in selected cases 

What Should You Do If You Experience Sudden Hearing Loss? 

If you notice sudden hearing changes, you should: 

  • Seek care from an Ear, Nose, and Throat (ENT) specialist as soon as possible 
  • Avoid self-treatment or waiting for symptoms to improve on their own 
  • Limit factors that may worsen the condition 

Hearing recovery depends on several factors, including: 

  • The patient’s age 
  • The initial severity of hearing loss 
  • Whether dizziness or tinnitus is present 
  • How quickly treatment is started 

Because sudden hearing loss may occur with dizziness, some people mistakenly think it is a neurological problem and visit the wrong specialty first, which can delay treatment during the critical recovery window. 

A Message for the Community 

Sudden hearing loss is not uncommon but can easily be overlooked. Early recognition and prompt treatment are essential to preserve hearing. Anyone experiencing sudden hearing loss should seek medical attention immediately. 

At Hoan My Cuu Long Hospital, patients can receive ENT evaluation and appropriate treatment for sudden hearing loss according to current medical guidelines, helping maximize the chances of hearing recovery.