Ringing in the ear is almost always caused by changes in how your inner ear sends signals to your brain. The most common trigger is damage to the tiny sensory cells inside your cochlea, often from noise exposure or aging, but the list of possible causes ranges from something as simple as earwax buildup to conditions that need medical attention. Understanding which type you’re dealing with helps determine whether it will resolve on its own or needs treatment.
How the Brain Creates a Phantom Sound
Your inner ear contains thousands of microscopic hair cells that convert sound waves into electrical signals for your brain. When some of these cells are damaged or lost, the brain receives less input from certain frequency ranges. In response, neurons that used to process those frequencies become hyperactive, firing on their own and even sprouting new connections to compensate for the missing signal. This hyperactivity is what you perceive as ringing, buzzing, or hissing.
Your brain actually has a built-in noise cancellation system. Emotional processing centers normally identify this unwanted neural noise and filter it out before it reaches conscious awareness. When that filtering system works properly, you never notice the phantom signal. But when stress, anxiety, or other factors disrupt this circuit, the ringing breaks through and becomes something you can hear. This is why tinnitus often worsens during periods of high stress or poor sleep, and why two people with the same degree of hearing damage can have very different experiences with ringing.
Inner Ear Damage: The Most Common Cause
The outer hair cells in your cochlea act as biological amplifiers, boosting faint sounds before they reach the inner hair cells that actually send signals to your brain. Even minor losses of these outer hair cells, too small to show up on a standard hearing test, can reduce the signal reaching your brain enough to trigger tinnitus. This means you can have completely “normal” hearing on paper and still experience persistent ringing.
The most frequent sources of this hair cell damage are:
- Noise exposure. Concerts, power tools, earbuds at high volume, and occupational noise all damage outer hair cells over time. A single very loud event can do it too.
- Age-related hearing loss. Hair cells naturally deteriorate as you get older, which is why tinnitus becomes more common after age 50.
- Head or ear injuries. Trauma to the skull or inner ear can destroy hair cells or disrupt the nerve pathways that carry sound signals.
When the mismatch between outer and inner hair cell function becomes large enough, it creates a kind of desynchronization in the signals traveling up to the brain. The brain interprets this scrambled input as sound, even when no external sound exists.
Earwax and Other Reversible Causes
Before assuming the worst, it’s worth knowing that one of the most common and easily fixable causes of ringing is impacted earwax. When cerumen builds up enough to partially or fully block the ear canal, it changes the pressure dynamics inside the ear and can produce tinnitus, muffled hearing, a feeling of fullness, or even pain. Complete blockage isn’t necessary for symptoms to appear. Once the wax is safely removed, the ringing typically stops.
Other reversible causes include ear infections (which create inflammation and fluid buildup), congestion from a cold or allergies, and sudden changes in altitude or pressure. If the ringing started suddenly alongside stuffiness or after a flight, it may clear up on its own or with treatment of the underlying issue.
Medications That Can Trigger Ringing
Certain drugs are known to be “ototoxic,” meaning they can damage hearing structures or trigger tinnitus as a side effect. The risk generally increases with higher doses and longer use. Classes most likely to cause problems include:
- High-dose aspirin and related pain relievers. At daily doses used for chronic conditions, these are well-documented triggers. The effect is often reversible when the dose is reduced.
- Certain antibiotics. Macrolide antibiotics like azithromycin and clarithromycin can affect hearing, particularly at high doses or with prolonged courses.
- Loop diuretics. These are prescribed for heart failure and kidney disease and can cause temporary or lasting tinnitus.
- Chemotherapy drugs. Platinum-based agents used in cancer treatment carry a significant risk of hearing damage.
If ringing started shortly after beginning a new medication, that timing is worth mentioning to your prescriber. In many cases, the tinnitus fades after the drug is stopped or the dose is adjusted.
Jaw Problems and the Ear Connection
The temporomandibular joint (TMJ), the hinge that connects your jaw to your skull, sits remarkably close to the structures of the middle ear. The jaw and middle ear share muscles, ligaments, and nerve pathways. When dysfunction in the jaw joint causes irritation or inflammation in this shared anatomy, it can alter how sound is perceived and produce ringing, clicking, or a sensation of fullness in the ear.
Clues that your jaw may be involved include ringing that changes with chewing or jaw movement, pain or clicking in the jaw, teeth grinding, or facial tension. Treating the jaw problem, through physical therapy, a bite guard, or stress reduction, often improves or eliminates the tinnitus.
Pulsatile Tinnitus: When You Hear Your Heartbeat
If the sound you hear is rhythmic and pulses in time with your heartbeat, that’s a distinct condition called pulsatile tinnitus. Unlike the more common continuous ringing, pulsatile tinnitus usually has a specific, identifiable vascular cause. You’re hearing actual blood flow through vessels near your ear.
Known causes include atherosclerosis (narrowing of the carotid arteries from plaque buildup), abnormalities in the veins near the ear such as jugular bulb or sigmoid sinus irregularities, arteriovenous malformations where arteries connect directly to veins, and a condition called idiopathic intracranial hypertension where pressure inside the skull is elevated. Less commonly, a type of benign growth called a glomus tumor can be responsible.
Pulsatile tinnitus is worth investigating promptly because many of its causes are treatable, and some, like arteriovenous malformations, benefit from early detection.
Ménière’s Disease
Ringing that comes and goes alongside episodes of intense dizziness, fluctuating hearing loss, and a feeling of pressure in one ear may point to Ménière’s disease, a disorder of the inner ear. A formal diagnosis requires at least two spontaneous episodes of vertigo lasting anywhere from 20 minutes to 12 hours, plus documented hearing loss in the low to mid-frequency range. The symptoms tend to affect one ear and occur unpredictably. Ménière’s is a chronic condition, but its episodes can often be managed with dietary changes and other interventions.
When One-Sided Ringing Needs Attention
Ringing that affects only one ear deserves closer evaluation. While it can have benign explanations, unilateral tinnitus is the hallmark symptom of an acoustic neuroma, a slow-growing benign tumor on the nerve that carries sound and balance signals from the inner ear to the brain. About 9 out of 10 people with an acoustic neuroma experience hearing loss in just one ear, often accompanied by ringing on that same side and sometimes balance problems.
Acoustic neuromas are not cancerous and grow slowly, but they can press on surrounding structures over time. An MRI can confirm or rule out this diagnosis. One-sided ringing accompanied by gradual hearing loss on the same side, or new difficulty with balance, warrants imaging to be safe.
Stress, Sleep, and the Volume Knob
Even when the underlying cause is physical, stress and sleep deprivation reliably make tinnitus louder and harder to ignore. This isn’t imaginary. The brain’s noise cancellation circuit depends on limbic structures involved in emotion and stress regulation. When those structures are overwhelmed, they lose their ability to filter out the tinnitus signal, and it floods into conscious awareness. This creates a feedback loop: the ringing causes stress, and the stress amplifies the ringing.
This is why many tinnitus management approaches focus not on eliminating the sound itself but on retraining the brain’s response to it. Sound therapy, cognitive behavioral therapy, and techniques that reduce the emotional charge of the ringing can lower its perceived volume over time, even when the underlying hair cell damage hasn’t changed.