Introduction

COVID-19, the disease caused by SARS-CoV-2 and sometimes written as covid19 in online discussions, is best known for respiratory symptoms such as cough and shortness of breath. However, many patients also report neurological and ear-related symptoms. Among these are dizziness, vertigo, tinnitus, and hearing loss. The field of otoneurology, which focuses on the connections between the inner ear, balance pathways, and the brain, has become increasingly relevant in evaluating and managing these complaints.

How COVID-19 May Affect the Inner Ear

The inner ear contains the cochlea for hearing and the vestibular system for balance. Research has shown that cells in the inner ear express angiotensin-converting enzyme 2, or ACE2, the receptor used by SARS-CoV-2 to enter human cells. This makes the inner ear a potential target for direct viral invasion. In addition, inflammation, immune system reactions, and microvascular clotting can impair blood flow to the ear, damaging sensory hair cells or auditory nerve fibres.

These mechanisms help explain why some patients develop sudden sensorineural hearing loss, vertigo, or a persistent sense of imbalance after infection. The connections between the inner ear and brainstem are complex, and disruption at any point can produce symptoms that overlap with other neurological disorders.

Dizziness as a Symptom of COVID-19

Dizziness is a broad term that can describe lightheadedness, faintness, or a spinning sensation known as vertigo. In COVID-19, dizziness has been reported as an early symptom in some patients and as a lingering problem in others. Vestibular neuritis, an inflammation of the vestibular nerve, and labyrinthitis, which also affects the cochlea, have both been described in association with the infection.

Central causes are also possible. The virus can affect the brainstem and cerebellum, which help maintain balance. In some cases, dizziness may result from systemic factors such as dehydration, fever, low oxygen levels, or a drop in blood pressure. Because the causes are varied, a thorough otoneurological evaluation is important for determining the underlying mechanism.

Hearing Loss and Tinnitus

Hearing loss during or after COVID-19 is less common than dizziness, but it is a recognised concern. Sudden sensorineural hearing loss, which can develop rapidly in one ear, has been reported in case studies. Tinnitus, or ringing in the ears, is also frequently mentioned by patients, often persisting for weeks or months after the acute illness has resolved.

Some individuals experience hearing loss and vertigo together, suggesting involvement of the cochlea and vestibular organs at the same time. Hearing changes can be distressing and may affect quality of life, especially when they interfere with communication and daily activities.

The Role of Otoneurology in Evaluation

Otoneurology is the medical field dedicated to the assessment and treatment of complex dizziness, balance disorders, and disorders that link the ear and brain. A specialist in otoneurology may use detailed history-taking, audiometry to measure hearing, and vestibular tests to assess function of the balance organs. These evaluations help differentiate between peripheral causes, such as inner ear damage, and central causes, such as brainstem or cerebellar involvement.

For patients with post-COVID dizziness or hearing loss, a structured otoneurological approach can identify treatable conditions, guide rehabilitation, and provide reassurance when symptoms are benign. Vestibular rehabilitation therapy, hearing aids, and medications may all play a role in recovery.

When to Seek Medical Care

Anyone who develops sudden hearing loss or severe vertigo should seek medical attention promptly. Sudden sensorineural hearing loss is treatable, but timely intervention is important. Dizziness that continues for days, causes falls, or is accompanied by other neurological symptoms such as double vision, slurred speech, or weakness also requires urgent evaluation.

Even in the absence of a current infection, people who recovered from COVID-19 and have ongoing dizziness or hearing complaints can benefit from an otoneurological assessment. Persistent symptoms may require long-term management and rehabilitation.

Summary

COVID-19 is more than a respiratory illness. It can affect the inner ear and balance pathways, leading to dizziness, vertigo, hearing loss, and tinnitus. A growing body of clinical reports suggests that these symptoms can appear during the acute phase of the infection or as part of the longer post-COVID condition. Otoneurology provides an important framework for understanding, diagnosing, and managing these complications. While most patients improve over time, those with persistent or severe symptoms should seek specialised care.