Top Causes of Tinnitus Explained by Health Experts

Health Experts Explain What’s Behind That Ringing in Your Ears

That persistent ringing, buzzing, or hissing in your ears—known medically as tinnitus—affects an estimated 10% to 25% of adults, according to surveys cited by the National Institute on Deafness and Other Communication Disorders (NIDCD). While the condition is rarely linked to serious medical problems, it can disrupt sleep, concentration, and emotional well-being for those who experience it. Audiologists and researchers emphasize that tinnitus is not a single disease but a symptom with multiple potential causes, making diagnosis and treatment highly individualized.

What Is Tinnitus?

Tinnitus is the perception of sound without an external source. The NIDCD describes it as a “phantom noise” that may manifest as ringing, roaring, buzzing, whistling, humming, clicking, hissing, or squealing. The sound can be soft or loud, high- or low-pitched, and may occur in one or both ears—or even feel as if it’s originating inside the head. For some, it comes and goes; for others, it’s a constant presence. When tinnitus persists for three months or longer, it is classified as chronic.

While tinnitus is often associated with hearing loss, not everyone with the condition has measurable hearing impairment. The NIDCD notes that most people with tinnitus do have some degree of hearing loss, but the relationship between the two isn’t fully understood. In some cases, individuals with normal hearing tests still report tinnitus, suggesting other underlying mechanisms may be at play.

Nine Possible Causes of Tinnitus

Audiologists identify a range of factors that may contribute to tinnitus, though the exact cause often remains unclear. Below are nine of the most commonly cited triggers, based on clinical observations and research:

• Age-related hearing loss (presbycusis): Hearing typically declines with age, and this natural deterioration can lead to tinnitus. The NIDCD notes that hearing loss is a frequent companion of tinnitus, though the connection isn’t universal.
• Noise exposure: Prolonged or sudden exposure to loud noises—such as concerts, construction sites, or firearms—can damage the delicate hair cells in the inner ear, leading to both hearing loss and tinnitus. The NIDCD warns that even brief exposure to very loud sounds can cause lasting harm.
• Earwax blockage: A buildup of earwax can obstruct the ear canal, causing temporary hearing changes and tinnitus. The NIDCD states that removing the blockage often resolves the symptoms.
• Ear or sinus infections: Infections in the ear or sinuses can lead to inflammation and fluid buildup, which may trigger tinnitus. These cases are usually temporary and improve as the infection clears.
• Head or neck injuries: Trauma to the head or neck can affect the inner ear, hearing nerves, or brain regions involved in sound processing, potentially leading to tinnitus. The NIDCD notes that such injuries may also cause hearing loss or balance issues.
• Temporomandibular joint (TMJ) disorders: Problems with the jaw joint, located near the ear, can sometimes cause or worsen tinnitus. The NIDCD explains that the proximity of the TMJ to the ear’s structures may explain this link.
• Medications (ototoxic drugs): Certain medications, including high doses of aspirin, nonsteroidal anti-inflammatory drugs (NSAIDs), some antibiotics, diuretics, and chemotherapy drugs, can damage the inner ear and lead to tinnitus. The NIDCD advises that symptoms may improve if the medication is discontinued or adjusted under medical supervision.
• Vascular conditions: In rare cases, tinnitus may be linked to blood vessel disorders, such as high blood pressure, atherosclerosis, or malformed blood vessels. These conditions can cause pulsatile tinnitus, where the sound synchronizes with the heartbeat. The NIDCD emphasizes that this type of tinnitus warrants medical evaluation.
• Hidden hearing loss: Emerging research, including studies from Harvard Medical School, suggests that some people with normal hearing tests may still have damage to the auditory nerve—the pathway that carries sound signals from the ear to the brain. This “hidden” hearing loss may contribute to tinnitus even when conventional hearing tests appear normal. A 2023 study published in Scientific Reports, led by Harvard-affiliated researchers, found that individuals with chronic tinnitus and normal hearing tests often showed reduced auditory nerve responses and altered brainstem activity.

Why Some People Develop Tinnitus—and Others Don’t

The reasons why some people develop tinnitus while others with similar risk factors do not remain unclear. The NIDCD highlights that tinnitus is highly individualized, with symptoms varying widely in pitch, volume, and duration. Some people experience mild, occasional ringing, while others face constant, debilitating noise that interferes with daily life.

One leading theory, discussed in a 2024 Harvard Health article, suggests that tinnitus may result from the brain’s attempt to compensate for reduced sound input. When the inner ear or auditory nerve is damaged, the brain may “fill in the gaps” by generating phantom sounds. However, this theory doesn’t fully explain why some people with normal hearing tests still develop tinnitus. Researchers at Harvard Medical School have proposed that “hidden” hearing loss—damage to the auditory nerve not detected by standard hearing tests—may play a role in these cases.

Stephane Maison, an associate professor of Otolaryngology–Head and Neck Surgery at Harvard Medical School and a tinnitus researcher, has studied this phenomenon. In the 2023 Scientific Reports study, Maison and colleagues found that individuals with chronic tinnitus and normal hearing tests often exhibited reduced auditory nerve function and altered brainstem activity compared to those without tinnitus. The findings suggest that tinnitus may stem from subtle disruptions in how the brain processes sound, even when hearing appears intact.

When to Seek Medical Attention

The NIDCD advises that tinnitus is rarely a sign of a serious medical condition, but it recommends consulting a healthcare provider if:

• The tinnitus occurs suddenly without an obvious cause, such as noise exposure.
• The sound is accompanied by hearing loss, dizziness, or balance problems.
• The tinnitus is pulsatile (synchronized with the heartbeat), which may indicate a vascular issue.
• The symptoms are severe enough to interfere with daily activities, sleep, or emotional well-being.

Audiologists typically begin with a hearing test to assess for hearing loss. If the tinnitus is pulsatile or accompanied by other concerning symptoms, additional tests—such as imaging or blood work—may be recommended to rule out underlying conditions.

Managing Tinnitus: What Works?

While there is no cure for tinnitus, several approaches can help reduce its impact. The NIDCD outlines the following strategies:

• Sound therapy: Using background noise—such as white noise machines, fans, or nature sounds—can help mask the tinnitus and make it less noticeable. Hearing aids may also amplify external sounds, reducing the perception of ringing.
• Behavioral therapies: Cognitive behavioral therapy (CBT) and tinnitus retraining therapy (TRT) can help individuals reframe their response to tinnitus, reducing distress and improving coping skills. The NIDCD notes that these therapies don’t eliminate the sound but can make it less bothersome.
• Medications: While no drug specifically treats tinnitus, some medications—such as antidepressants or anti-anxiety drugs—may help manage associated symptoms like depression or insomnia. The NIDCD cautions that these should be used under medical supervision.
• Lifestyle adjustments: Reducing caffeine, alcohol, and nicotine intake may help some people, as these substances can exacerbate tinnitus. Stress management techniques, such as mindfulness or relaxation exercises, may also provide relief.

The NIDCD emphasizes that treatment is highly individualized. What works for one person may not work for another, and a combination of approaches is often most effective. For severe cases, support groups or counseling can provide emotional relief and practical strategies for living with tinnitus.

Ongoing Research and Future Directions

Research into tinnitus is ongoing, with scientists exploring new theories about its causes and potential treatments. The NIDCD highlights several areas of active investigation:

• Neural mechanisms: Researchers are studying how changes in the brain’s auditory pathways contribute to tinnitus. This includes investigating the role of neural hyperactivity and plasticity—the brain’s ability to reorganize itself in response to damage.
• Hidden hearing loss: Studies like the 2023 Scientific Reports paper are shedding light on how auditory nerve damage, even in people with normal hearing tests, may contribute to tinnitus. This research could lead to more sensitive diagnostic tools and targeted therapies.
• Pharmacological treatments: While no drug currently cures tinnitus, researchers are testing medications that target specific neural pathways or reduce inflammation in the auditory system. Clinical trials are exploring whether these drugs can provide relief for some individuals.
• Non-invasive brain stimulation: Techniques such as transcranial magnetic stimulation (TMS) and transcranial direct current stimulation (tDCS) are being studied as potential ways to modulate brain activity and reduce tinnitus symptoms.

The NIDCD notes that while progress is being made, tinnitus remains a complex and poorly understood condition. For now, the focus remains on managing symptoms and improving quality of life for those affected.

Key Takeaways

• Tinnitus is a common condition characterized by the perception of sound without an external source, affecting 10% to 25% of adults.
• It can manifest as ringing, buzzing, roaring, or other sounds, and may be temporary or chronic.
• Common causes include age-related hearing loss, noise exposure, earwax blockage, infections, head or neck injuries, TMJ disorders, medications, and vascular conditions.
• Emerging research suggests that “hidden” hearing loss—damage to the auditory nerve not detected by standard tests—may contribute to tinnitus in some people with normal hearing.
• While there is no cure, sound therapy, behavioral therapies, medications, and lifestyle adjustments can help manage symptoms.
• Ongoing research is exploring the neural mechanisms of tinnitus, potential pharmacological treatments, and non-invasive brain stimulation techniques.

For those experiencing tinnitus, consulting a healthcare provider can help identify potential causes and explore management strategies tailored to individual needs.