Constant ear ringing, known as tinnitus, affects roughly 27 million adults in the United States, about 11.2% of the population. Of those, more than 40% experience symptoms all the time, and nearly 30% have dealt with them for 15 years or longer. The sound isn’t coming from outside your body. It’s generated by your own nervous system, typically in response to some form of damage or disruption along the pathway between your ears and your brain.
How Your Brain Creates a Sound That Isn’t There
Most constant ear ringing starts with a problem in the inner ear, specifically with the tiny hair cells in the cochlea that convert sound waves into electrical signals. When those cells are damaged by noise, aging, infection, or injury, they send fewer signals to the brain. In response, the brain turns up its own volume. Neurons in the auditory pathway become hyperactive, firing spontaneously and synchronizing with each other in patterns that your brain interprets as sound.
This isn’t limited to one spot. The abnormal signaling can involve relay stations throughout the auditory system, from the brainstem all the way up to the auditory cortex. Over time, these changes can spread beyond the hearing centers, pulling in brain networks involved in attention and emotion. That’s why tinnitus often feels louder during stress or anxiety: the brain regions that process threat are amplifying the signal.
Noise Exposure Is the Most Common Trigger
Prolonged or repeated exposure to loud sound is the single most frequent cause of permanent tinnitus. Sounds at or below 70 decibels, roughly the level of a washing machine, are unlikely to cause hearing damage even over long periods. But sounds at or above 85 decibels (heavy traffic, a crowded restaurant, a lawnmower) can cause damage with repeated exposure, and the louder the noise, the faster the damage accumulates. A single concert at 110 decibels can be enough to trigger ringing that lasts days, weeks, or permanently.
The mechanism is straightforward: intense sound physically destroys the delicate hair cells in your inner ear. Unlike skin or bone, these cells don’t regenerate in humans. Once they’re gone, the brain compensates with the neural hyperactivity described above, producing the phantom sound. People who work in construction, music, the military, or manufacturing are at the highest risk, but recreational noise exposure from headphones, concerts, and power tools accounts for a large share of cases too.
Medications That Can Cause or Worsen Ringing
Certain medications are “ototoxic,” meaning they can damage inner ear structures and trigger tinnitus as a side effect. The risk is higher at large doses or with prolonged use. Drug classes most commonly linked to ear ringing include:
- High-dose aspirin and related pain relievers. At standard doses aspirin rarely causes problems, but at the higher doses sometimes used for inflammatory conditions, ringing is a well-known side effect. It’s often reversible when the dose is reduced.
- Certain antibiotics. Macrolide antibiotics like azithromycin and clarithromycin can affect hearing, particularly during long courses at high doses.
- Loop diuretics. These are prescribed for heart failure and kidney disease to help the body shed excess fluid. They can temporarily or permanently affect inner ear function.
- Chemotherapy drugs. Platinum-based agents used in cancer treatment are among the most ototoxic medications in use.
- Some biologic therapies. Newer drugs derived from living organisms, including certain immunotherapies, have also been associated with hearing changes.
If you notice new or worsening ringing after starting a medication, that connection is worth raising with whoever prescribed it. In many cases, the effect is dose-dependent and reversible.
Jaw Problems and the Ear Connection
Dysfunction in the temporomandibular joint (TMJ), the hinge that connects your jaw to your skull, is a surprisingly common contributor to tinnitus. The jaw joint sits just millimeters from the ear canal, and the two structures share nerve pathways and muscular connections.
There are a few ways a jaw problem can produce or amplify ringing. The chewing muscles sit close to muscles that attach to the middle ear, so tension or dysfunction in one group can affect the other. A ligament connecting the jaw to one of the small hearing bones in the middle ear can become strained or inflamed, directly influencing how sound is transmitted. And the nerve supply from the TMJ has demonstrated connections to parts of the brain involved in hearing and sound interpretation. If you notice that your tinnitus changes when you clench your jaw, chew, or open your mouth wide, a jaw-related cause is worth investigating.
Pulsatile Tinnitus: When Ringing Matches Your Heartbeat
If the sound you hear is rhythmic and seems to pulse in time with your heartbeat, that’s a distinct condition called pulsatile tinnitus. Unlike the more common steady ringing, pulsatile tinnitus usually has a detectable physical source: you’re hearing blood flowing through vessels near your ears.
High blood pressure can cause this by putting extra force on blood vessel walls close to the inner ear. Atherosclerosis, the buildup of fatty deposits inside arteries, can make blood flow turbulent and noisy. Other vascular abnormalities, including narrowed arteries or unusual connections between blood vessels, can produce the same effect. Pulsatile tinnitus is more likely than standard tinnitus to have a treatable underlying cause, so it’s worth getting checked out specifically rather than assuming it’s the same condition.
Meniere’s Disease and Inner Ear Disorders
Meniere’s disease is an inner ear condition that bundles tinnitus with other distinctive symptoms: episodes of vertigo that can last minutes to hours, fluctuating hearing loss (often affecting low frequencies or a combination of low and high frequencies), and a sensation of fullness or pressure in the affected ear. Between episodes, balance typically returns to normal, but the tinnitus and hearing loss can become more persistent over time.
The condition is thought to involve abnormal fluid buildup in the inner ear, though the exact trigger remains unclear. Diagnosing it involves hearing tests, balance testing, and ruling out other causes that produce similar symptoms, including in rare cases brain tumors or neurological conditions like multiple sclerosis.
Age-Related Hearing Loss
Gradual hearing loss that comes with aging, called presbycusis, is one of the most common causes of constant tinnitus in people over 60. The process is the same as noise-induced damage but spread over decades: hair cells in the inner ear slowly deteriorate, the brain loses input, and neural hyperactivity fills the gap. The ringing tends to develop so gradually that many people don’t connect it to their hearing loss until both are well established. A standard hearing test can reveal whether age-related loss is contributing to your symptoms.
Warning Signs That Need Prompt Attention
Most tinnitus is a nuisance, not an emergency. But certain patterns signal something more serious. Ringing that appears only in one ear deserves investigation, because unilateral tinnitus can sometimes indicate a growth on the auditory nerve. Tinnitus that arrives suddenly alongside hearing loss in one ear may be sudden sensorineural hearing loss, a condition where early treatment significantly improves outcomes. People with this condition often also notice ear fullness and dizziness along with the ringing.
Pulsatile tinnitus, as mentioned above, always warrants evaluation because it can point to vascular problems that need treatment. And any tinnitus accompanied by neurological symptoms like facial numbness, difficulty with balance, or vision changes should be assessed quickly to rule out conditions affecting the brain or brainstem.