What Is Sudden Hearing Loss? Symptoms and Treatment

Sudden hearing loss is a rapid-onset sensorineural hearing loss that usually develops within a few hours to three days and mostly occurs in one ear. It may develop due to sudden disorders in the inner ear, auditory nerve, or circulatory system, and if not diagnosed and treated early, it may lead to permanent hearing loss.

Symptoms of sudden hearing loss include suddenly reduced or completely lost hearing in the ear, a feeling of fullness in the ear, tinnitus, and dizziness in some patients. This condition is often noticed upon waking in the morning, and patients usually describe it as sounds being muffled or distant in one ear.

Possible causes of sudden hearing loss may include viral infections, circulatory disorders in the inner ear, immune system diseases, trauma, or rarely tumoral formations. In a significant portion of cases, the exact cause cannot be identified, and this condition is defined as idiopathic sudden hearing loss.

Treatment of sudden hearing loss is based on medical intervention started in the early period, and corticosteroid treatment is most commonly applied. When necessary, vasodilator drugs, hyperbaric oxygen therapy, or intratympanic injection methods may be used, and early treatment increases the likelihood of regaining hearing.

What Is Sudden Hearing Loss?

Sudden hearing loss, medically known as sudden sensorineural hearing loss, is a condition that usually occurs in less than 72 hours and is characterized by a hearing decrease of 30 decibels (dB) or more in at least three consecutive frequencies. This is the rapid loss of a person’s noticeable hearing ability without a sudden noise explosion or trauma. Just like a radio signal suddenly becoming distorted and cutting out, a problem occurring in the delicate structures inside the ear or in the auditory nerve prevents sound from being transmitted to the brain. Although this condition is usually seen unilaterally, it can rarely affect both ears. The exact cause of sudden hearing loss is often unclear; this condition is called idiopathic. However, experts believe that various factors may lie behind this sudden silence.

Causes of Sudden Hearing Loss

There are many potential underlying causes of sudden hearing loss. These causes cover a wide range, from infections to circulatory disorders, autoimmune diseases to neurological problems.

• Viral Infections: Viral infections such as the common cold, flu, or mumps may cause sudden hearing loss by damaging the delicate hair cells inside the ear (cochlea) or by inflaming the auditory nerve. Viruses can endanger ear health by straining the body’s defense mechanism.
• Circulatory Disorders: Blockages or sudden interruptions in blood flow in the fine blood vessels inside the ear may cause the cochlea to be deprived of oxygen and become damaged. This condition, just like an organ having a heart attack, may lead to hearing loss. High blood pressure or blood clotting problems may increase this risk.
• Autoimmune Diseases: Conditions in which the body’s own immune system attacks ear structures may cause sudden hearing loss. Diseases such as rheumatoid arthritis or lupus may lead to inflammation and damage in hearing organs.
• Neurological Disorders: Brain tumors (especially acoustic neuroma), multiple sclerosis (MS), or other neurological diseases may cause sudden hearing loss by affecting the auditory nerve or the hearing centers of the brain.
• Trauma: Head traumas, especially impacts that damage the eardrum or inner ear structures, may cause sudden hearing loss. Loud explosions or sudden pressure changes also fall into this category.
• Meniere’s Disease: This disease, characterized by imbalance of inner ear fluid, may cause attacks of hearing loss, tinnitus, and dizziness.
• Ototoxic Drugs: The use of some antibiotics (such as aminoglycosides), chemotherapy drugs, or ototoxic (harmful to the ears) drugs such as high-dose aspirin may trigger hearing loss.
• Metabolic Disorders: Metabolic diseases such as diabetes or thyroid problems may indirectly affect ear health.
• Stress and Anxiety: There are some findings suggesting that excessive stress and anxiety may trigger sudden hearing loss by disrupting blood circulation or causing hormonal imbalances.

Who Is at Risk?

Although sudden hearing loss can occur at any age, some groups are at higher risk.

• Elderly Individuals: With the aging process, natural wear occurs in ear structures, which increases the risk of sudden hearing loss.
• Diabetes Patients: Difficulties in blood sugar regulation may negatively affect ear vessels.
• Those with Cardiovascular Disease: High blood pressure, high cholesterol, and atherosclerosis may disrupt ear blood flow.
• Those with Autoimmune Disease: Diseases in which the body attacks its own tissues may target hearing organs.
• Those Working in Noisy Environments: People constantly exposed to loud sound, such as factory workers, musicians, or construction workers, are at risk.
• Smokers: Smoking negatively affects ear circulation by narrowing blood vessels.
• Those Using Certain Medications: Those who regularly use medications on the ototoxic drug list should be careful.

Symptoms of Sudden Hearing Loss

Sudden hearing loss, as the name suggests, usually appears suddenly and with noticeable symptoms. These symptoms can seriously disrupt a person’s daily life and require urgent medical intervention.

Most Common Symptoms

• Unilateral Hearing Loss: The most common symptom is hearing reduction that usually starts suddenly in one ear and is noticed. You may suddenly notice that the phone rings less in that ear or that you have difficulty understanding someone’s speech. This creates a feeling as if one ear is blocked.
• Tinnitus: Along with hearing loss or on its own, abnormal sounds such as ringing, buzzing, humming, or whistling may be heard in the ear. These sounds may become more noticeable in quiet environments and may disturb the person’s concentration.
• Dizziness (Vertigo): Especially in conditions affecting the balance organs in the inner ear, severe dizziness and loss of balance may occur together with sudden hearing loss. This creates a feeling as if the room is spinning.
• Feeling of Fullness in the Ear: A feeling of pressure or fullness may occur in the affected ear. This creates a discomforting feeling as if there is something inside the ear.
• Difficulty Understanding Speech: Especially in noisy environments, it becomes difficult to distinguish and understand speech. Sounds may seem muffled or incomprehensible.

Other Possible Symptoms

• Headache: In some cases, headache accompanying hearing loss may be seen.
• Nausea and Vomiting: In cases of severe dizziness, nausea and vomiting may also accompany it.
• Ear Pain: Although rare, mild ear pain has also been reported in some cases of sudden hearing loss.

When you suddenly notice any of these symptoms, it is vitally important to consult an ear, nose, and throat (ENT) specialist without losing time. Early diagnosis and treatment play a critical role in reversing hearing loss.

Treatment of Sudden Hearing Loss

Sudden hearing loss is a medical emergency, and rapid intervention significantly increases the chance of success. Treatment varies depending on the cause, severity, and how long the loss has been ongoing. The most important rule is this: the earlier treatment is started, the higher the possibility of recovery.

First Steps and Diagnosis

When any sign of hearing loss is noticed, the first step is to consult an ENT specialist. Your doctor will follow the steps below to determine the cause of hearing loss:

1. Taking Medical History: Your doctor will ask in detail when the symptoms started, their severity, accompanying other symptoms (dizziness, tinnitus, etc.), and your general health condition.
2. Physical Examination: The eardrum, external ear canal, and middle ear are examined with an ear, nose, and throat examination.
3. Audiometry (Hearing Test): Various hearing tests are performed to determine the degree and type of hearing loss. These tests clearly show at which frequencies and how much hearing loss exists.
4. Imaging Methods: When deemed necessary, imaging techniques such as MRI or CT may be used to rule out structural problems such as a brain tumor or inner ear abnormalities.
5. Blood Tests: If infection or autoimmune disease is suspected, blood tests may be requested.

Treatment Methods

The main purpose in the treatment of sudden hearing loss is to reduce inflammation in the inner ear, improve blood circulation, and allow damaged cells to heal.

Corticosteroids

• Oral Corticosteroids: These drugs are the first preferred method in the treatment of sudden hearing loss. Corticosteroids such as prednisone reduce inflammation in the inner ear, decrease swelling, and help cells heal. They are usually started at a high dose and gradually reduced over several weeks.
• Intratympanic (Into the Ear) Steroid Injections: In order to avoid the side effects of oral steroids or in cases where sufficient response is not obtained, corticosteroids can be injected directly into the middle ear cavity. This method allows the drug to reach the target area directly and minimizes systemic side effects.

Hyperbaric Oxygen Therapy (HBOT)

This treatment involves the patient breathing 100 percent oxygen in a special pressure chamber at a pressure higher than normal atmospheric pressure. HBOT may support the healing process by allowing more oxygen to be carried to damaged tissues inside the ear. It may be especially effective in sudden hearing losses related to circulatory disorders. It is usually applied in addition to steroid treatment.

Vasodilators and Hemorheological Agents

These drugs aim to increase blood flow by expanding the blood vessels inside the ear. Drugs that help prevent blood clotting may also be added to treatment. However, the use of these drugs is more controversial and is usually considered in cases that do not respond to other treatments.

Antiviral Drugs

If the cause of sudden hearing loss is thought to be a viral infection, antiviral drugs may be prescribed. However, this condition is rare and the diagnosis must be clear.

Supportive Treatments

• Tinnitus Management: Various management strategies are available for tinnitus accompanying hearing loss. These may include sound therapy, cognitive behavioral therapy (CBT), and some medications.
• Balance Therapy: Vestibular rehabilitation exercises may be recommended for patients experiencing dizziness and balance problems.
• Hearing Aids: If hearing loss becomes permanent, solutions such as hearing aids or cochlear implants may be considered to improve quality of life.

Timing of Treatment and Prognosis

Starting treatment within the first 48-72 hours in sudden hearing loss maximizes the success rate. The later treatment is started, the lower the chance of recovery. While hearing may return completely in some patients, partial recovery may be seen in others, or hearing loss may become permanent.

• Complete Recovery: Complete hearing recovery is possible in approximately 30-50% of cases.
• Partial Recovery: Partial recovery is seen in a significant portion of cases.
• Permanent Loss: In some cases, hearing loss may be permanent.

The experience of every individual with sudden hearing loss is different. Therefore, it is important to stay in close communication with your doctor, understand the treatment process, and get information about lifestyle changes.

Sudden Hearing Loss and Tinnitus

In a significant portion of patients experiencing sudden hearing loss, tinnitus, known as ringing in the ear, is also seen in addition to hearing reduction. Tinnitus is sounds perceived in the ear or inside the head even though there is no external sound source. These sounds may be in the form of ringing, buzzing, humming, whistling, crackling, or wave-like sounds.

Relationship of Tinnitus with Sudden Hearing Loss

• Common Causes: Factors that cause sudden hearing loss (viral infections, circulatory disorders, trauma, etc.) may also affect nerve cells in the inner ear and cause tinnitus to appear. Damaged nerve cells send abnormal signals to the brain, causing these sounds to be perceived.
• Neural Damage: Damage occurring in the cochlea organ in the inner ear lays the groundwork for both hearing loss and the development of tinnitus. Just like one of the strings of a musical instrument breaking, damaged cells may produce abnormal sounds.
• Brain Response: The brain may begin producing sound on its own in response to reduced auditory input (due to hearing loss). This is associated with increased neural activity in the auditory cortex of the brain.

Management of Tinnitus

Even if sudden hearing loss is treated and hearing is partially or completely regained, tinnitus may continue. Treatment of tinnitus is usually not as direct as treatment of hearing loss, but it can be managed.

• Treatment of the Underlying Cause: If tinnitus is due to a treatable cause of sudden hearing loss, tinnitus may decrease or disappear as hearing loss improves.
• Sound Therapy: It is possible to mask tinnitus or distract attention by using low-level background sounds (nature sounds, white noise, etc.). Sound generators or special tinnitus masking devices may be used.
• Cognitive Behavioral Therapy (CBT): This is a type of therapy focused on changing negative thought and behavior patterns developed against tinnitus. It aims to make tinnitus less disturbing.
• Tinnitus Retraining Therapy (TRT): This is an approach that combines counseling and sound therapy. The aim is to stop the brain from perceiving tinnitus as a threat.
• Lifestyle Changes: Avoiding triggers such as caffeine, nicotine, and alcohol, managing stress, and getting enough sleep may help reduce the severity of tinnitus.
• Hearing Aids: If there is hearing loss, hearing aids may reduce the brain’s focus on tinnitus signals by amplifying external sounds.

Management of tinnitus is individualized. It is important to work with an ENT specialist and audiologist to determine the most appropriate management strategy for you.

Sudden Hearing Loss and Dizziness (Vertigo)

Another common companion of sudden hearing loss is dizziness, medically called vertigo. Vertigo is the sensation that the person themselves or their surroundings are moving; a feeling of spinning or swaying is experienced. This condition is due to the close relationship between the balance organs in the inner ear (vestibular system) and the cochlea, the hearing organ.

Relationship of Vertigo with Sudden Hearing Loss

• Vestibular System Involvement: Factors that cause sudden hearing loss (viruses, circulatory problems, inflammation, etc.) may often also affect the balance organs in the inner ear. This disrupts the normal functioning of the vestibular system and leads to vertigo attacks.
• Damage to Inner Ear Structures: The cochlea and vestibular system are located very close to each other in the inner ear. Therefore, a factor that damages one may also affect the other. For example, a problem in the blood vessels feeding the cochlea may also affect the vestibular system.
• Meniere’s Disease: Some sudden hearing loss cases may appear as a symptom of Meniere’s disease. Meniere’s disease is characterized by pressure changes in the inner ear fluid and may cause hearing loss, tinnitus, and severe vertigo attacks.
• Vestibular Neuritis or Labyrinthitis: These conditions are inflammation of the balance nerve in the inner ear (vestibular neuritis) or the inner ear labyrinth (labyrinthitis). They usually develop as a result of viral infections and may cause hearing loss along with sudden-onset severe vertigo.

Vertigo Management

Vertigo is one of the most disturbing symptoms of sudden hearing loss that reduces quality of life. Its treatment is planned according to the underlying cause and the severity of symptoms.

• Medication Treatment: Drugs such as antihistamines, anticholinergics, or benzodiazepines may be prescribed to control vertigo attacks. These drugs help reduce the feeling of dizziness by suppressing balance signals going to the brain.
• Vestibular Rehabilitation Therapy (VRT): This is a physical therapy program consisting of special exercises designed to help regain balance. VRT helps the brain adapt to and compensate for the damaged vestibular system.
• Epley Maneuver (or Other Maneuvers): If vertigo is caused by displacement of calcium crystals (otoconia) in the inner ear (Benign Paroxysmal Positional Vertigo – BPPV), special head positioning maneuvers such as the Epley maneuver may allow these crystals to be returned to the correct place. These maneuvers are usually performed by an ENT specialist.
• Diet and Lifestyle: Reducing salt intake, taking adequate fluids, and avoiding triggers such as alcohol and caffeine may help control symptoms, especially in conditions such as Meniere’s disease.
• Surgical Treatment: In very rare cases and when other treatment methods fail, surgical options may be considered, but this is usually the last resort.

If you experience vertigo together with sudden hearing loss, it is important to create a comprehensive treatment plan for both hearing loss and dizziness together with your ENT specialist.

Sudden Hearing Loss and Its Psychological Effects

Sudden hearing loss is not only a physical disorder but also a condition that can leave deep effects on an individual’s psychological health. Suddenly losing one of the most important senses that connects a person with the world may lead to serious emotional and mental difficulties.

Common Psychological Reactions

• Shock and Denial: The first reaction is usually shock and denial in the form of “How did this happen to me?” The person may have difficulty immediately accepting the seriousness of the condition.
• Fear and Anxiety: Intense fear and anxiety may be experienced due to concerns about whether the hearing loss will be permanent, fear of being cut off from social life, and worry about not being able to communicate. Thoughts such as “What if no one understands me?” or “What if I lose my job?” may be common.
• Depression: Isolation caused by hearing loss, communication difficulties, staying away from social activities, and a decline in quality of life may lead to a depressive mood. The person may feel hopeless and helpless.
• Anger and Disappointment: The condition being outside one’s control and the uncertainty of the treatment process may trigger feelings of anger and disappointment.
• Social Isolation: Due to difficulties in communication, the person may begin to avoid social environments. This may deepen psychological problems by increasing the feeling of loneliness.
• Loss of Self-Confidence: Not being able to communicate and express oneself may damage the person’s self-confidence.

Psychological Support and Coping Methods

Coping with sudden hearing loss requires both physical and psychological support.

• Getting Professional Help: Meeting with a psychologist or psychiatrist is very important in coping with the emotional difficulties experienced. Therapy can help combat anxiety, depression, and stress.
• Obtaining Information: Getting accurate and reliable information about the condition may reduce uncertainty and increase the feeling of control. Sources like this article may help in this regard.
• Strengthening Social Connections: Asking for support from family and friends and sharing feelings with them reduces the feeling of loneliness. It is important that people in your close circle understand your condition and are patient.
• Joining Support Groups: Coming together with other people experiencing sudden hearing loss, sharing experiences, and finding common solutions helps you feel that you are not alone and becomes a source of morale.
• Showing Self-Compassion: Be kind and understanding toward yourself during this difficult process. Recovery may take time and ups and downs may occur.
• Using Technology and Assistive Devices: Technological tools such as hearing aids and text-based communication applications can facilitate communication and support participation in social life.
• Stress Management Techniques: Relaxation techniques such as meditation, deep breathing exercises, and yoga may help reduce anxiety and stress.

Remember that experiencing sudden hearing loss is not a sign of weakness. Getting both medical and psychological support during this difficult process will positively affect your recovery process.