Ear ringing, known medically as tinnitus, affects about 14.4% of adults worldwide and stems from dozens of possible causes, from simple earwax buildup to noise damage to underlying medical conditions. Almost 10% of those affected experience chronic ringing lasting more than three months, while roughly 2% deal with a severe form that significantly disrupts daily life. Understanding what’s behind the sound is the first step toward addressing it.
What’s Actually Happening in Your Brain
Most people assume ear ringing originates in the ear itself, but the phantom sound is largely generated by the brain. When the delicate sensory cells in your inner ear (called hair cells) are damaged by noise, aging, or other insults, they send fewer signals to the brain. The auditory centers of the brain respond to this reduced input by turning up their own activity, essentially compensating for the missing signals by firing more on their own.
This compensation creates a cascade of changes. Neurons that no longer receive normal input start responding to frequencies from neighboring, still-functioning areas. The brain’s sound-processing map literally rewires itself around the gap. At the same time, the natural inhibitory signals that normally keep neural firing in check get weaker, tipping the balance toward overexcitation. The result is synchronized neural activity that the brain interprets as sound, even when no external sound exists. Research published in the Journal of Neuroscience suggests that this synchronized firing, more than just increased neural activity alone, is the primary driver of the ringing perception.
Noise Exposure
Loud noise is one of the most common and preventable causes of tinnitus. Sounds at or below 70 decibels, roughly the volume of a washing machine, are unlikely to cause hearing damage even with prolonged exposure. But repeated or sustained exposure at 85 decibels or above (think heavy traffic, a loud restaurant, or a lawnmower) can damage those inner-ear hair cells and trigger ringing. The louder the sound, the less time it takes to cause harm.
A single explosive noise, like a gunshot or fireworks at close range, can cause immediate and permanent tinnitus by rupturing the eardrum or damaging the tiny bones of the middle ear. More commonly, though, noise-induced tinnitus develops gradually over months or years of cumulative exposure. Concert-goers, construction workers, musicians, and military personnel face especially high risk. The ringing that follows a loud event sometimes fades within hours or days, but it can also become permanent if the underlying damage is severe enough.
Earwax Buildup
Your ear canal normally pushes old wax outward on its own, but when this self-cleaning process fails, wax can accumulate and press against the eardrum. This impaction creates a range of symptoms including muffled hearing, ear pain, itching, and tinnitus. The good news is that this is one of the most easily reversible causes of ear ringing. Once the wax is professionally removed, the ringing typically stops, though if symptoms persist after the ear canal is clear, another cause should be investigated.
Medications That Affect Hearing
Certain medications can damage the inner ear as a side effect. The most well-known culprits include certain antibiotics (particularly a class called aminoglycosides), platinum-based chemotherapy drugs, high-dose aspirin, quinine, and a type of diuretic used to treat fluid retention. Tinnitus is often one of the earliest warning signs of this kind of drug-related ear damage.
The onset can be unpredictable. In some cases, significant hearing changes occur after just a single dose. With aminoglycoside antibiotics specifically, up to one-third of adult patients show measurable hearing changes during treatment. The damage typically affects both ears and targets high-frequency hearing first. If you notice new or worsening ringing while taking any medication, bringing it up with your prescriber promptly can sometimes prevent further damage, as the effects may be partially reversible if the drug is adjusted early.
Jaw Problems and Muscle Tension
The jaw joint sits remarkably close to the structures of the middle and inner ear. The two areas share muscles, ligaments, and nerve pathways, which means dysfunction in one can affect the other. Temporomandibular joint disorders, where the jaw joint becomes inflamed, misaligned, or strained, can produce or worsen tinnitus by irritating these shared pathways.
This type of tinnitus often has some distinguishing features. It may fluctuate with jaw movement, chewing, or clenching. Some people notice it worsens during periods of stress when they unconsciously tighten their jaw or grind their teeth at night. Treating the jaw problem, whether through physical therapy, a bite guard, or other approaches, frequently reduces or eliminates the ringing.
Ménière’s Disease
Ménière’s disease is an inner-ear condition that causes episodes of vertigo (spinning dizziness), fluctuating hearing loss, tinnitus, and a sensation of fullness or pressure in the affected ear. A formal diagnosis requires at least two vertigo episodes lasting between 20 minutes and 24 hours, along with documented hearing loss and tinnitus or ear pressure. The ringing in Ménière’s disease tends to come and go alongside vertigo attacks rather than remaining constant, and it usually affects one ear.
Pulsatile Tinnitus: A Different Kind of Ringing
Most tinnitus is a steady tone or hiss, but some people hear a rhythmic whooshing or thumping that beats in sync with their pulse. This is pulsatile tinnitus, and it has a fundamentally different set of causes. Rather than damaged hair cells, it typically involves blood flow changes near the ear.
Several vascular issues can produce this sound. Certain veins near the ear, particularly three small veins behind and below the ear, can generate turbulent flow that becomes audible. Variations in the jugular vein, present in 10 to 15% of people, including a jugular bulb that sits unusually high or a small outpouching in the vein wall, can also be responsible. Abnormal connections between arteries and veins near the brain (called dural arteriovenous fistulas) are a rarer but more serious cause. Elevated pressure inside the skull, a condition called idiopathic intracranial hypertension, is another common vascular trigger. Because pulsatile tinnitus can signal a structural problem with blood vessels, it generally warrants imaging to identify the source.
Age-Related Hearing Loss
Hearing naturally declines with age, typically starting with high-frequency sounds. This gradual loss of input to the brain triggers the same compensatory neural changes described earlier: increased spontaneous firing, weakened inhibition, and reorganized sound maps. Many people over 60 who develop tinnitus can trace it to this slow, cumulative loss of hair cell function, even if they’ve never been exposed to unusually loud environments. The ringing often occupies the same frequency range where hearing has deteriorated most.
When Ringing Signals Something More Serious
In rare cases, tinnitus is a symptom of a growth on the nerve that connects the inner ear to the brain, called a vestibular schwannoma (or acoustic neuroma). The hallmark pattern is gradual hearing loss on one side over months to years, accompanied by ringing in the same ear. Some people also notice facial numbness or weakness on the affected side. These tumors are almost always noncancerous but can grow large enough to compress surrounding brain structures if left undetected.
Hearing loss or ringing that is noticeably worse in one ear deserves attention, as most common causes of tinnitus affect both ears roughly equally. The same applies to tinnitus that arrives suddenly, pulsatile tinnitus, or ringing accompanied by dizziness, facial changes, or rapid hearing decline. These patterns don’t always indicate something dangerous, but they’re the ones most worth investigating with a hearing test and, if needed, imaging.