Ringing in your ears, known as tinnitus, is most often caused by damage to tiny sensory cells in your inner ear. It affects roughly 14% of adults worldwide, which translates to more than 740 million people. For most, the sound is mild or intermittent, but about 120 million people globally experience it as a significant, ongoing problem. The causes range from noise exposure and aging to medications, jaw problems, and vascular conditions.
What Happens Inside Your Ear
Your inner ear contains two types of hair cells that work together to convert sound waves into electrical signals your brain can interpret. The outer hair cells amplify incoming sound, and the inner hair cells translate that amplified signal into nerve impulses sent to the brain. When outer hair cells are damaged, even slightly, they fail to amplify sound properly. This creates a mismatch between the two cell types, and the reduced signal reaching the brain triggers a compensating response.
Think of it like turning up the volume on a radio with a weak signal: you get more static. Your brain, receiving less input from the damaged ear, essentially turns up its own internal gain. That amplified neural activity is what you perceive as ringing, buzzing, hissing, or humming. Importantly, outer hair cell losses can be minor enough that a standard hearing test comes back normal, yet still sufficient to produce tinnitus. This is why many people with ringing in their ears are told their hearing is “fine.”
Noise Exposure
Loud sound is the single most preventable cause of tinnitus. Sounds at or below 70 decibels, roughly the level of a washing machine, are unlikely to cause damage even with prolonged exposure. But repeated or sustained exposure at 85 decibels or above (think heavy traffic, a crowded restaurant, or a lawnmower) can permanently destroy hair cells. The louder the sound, the less time it takes to do damage.
After a loud concert or a night at a noisy bar, you might notice temporary ringing that fades within 16 to 48 hours. That recovery can be misleading. Recent research from the National Institute on Deafness and Other Communication Disorders suggests that even when hearing seems to return to normal, residual long-term damage may remain. A single burst of extreme noise, like an explosion or gunshot, can cause immediate, permanent hearing loss and tinnitus with no recovery period at all.
Age-Related Hearing Loss
Gradual hearing decline is one of the most common reasons people develop persistent tinnitus later in life. As you age, the hair cells in your inner ear naturally deteriorate, especially those responsible for high-frequency sounds. The brain responds to this reduced input the same way it responds to noise damage: by increasing its internal volume, which produces a phantom sound. Studies consistently show strong associations between increasing severity of age-related hearing loss and tinnitus, with older age and male sex among the strongest risk factors. Existing health conditions, lifestyle factors like smoking, and psychological burden such as chronic stress or anxiety also increase the likelihood of both hearing loss and tinnitus worsening over time.
Medications That Affect the Ear
Certain drugs are directly toxic to the structures of the inner ear. This is called ototoxicity, and tinnitus is often one of the earliest warning signs. The medications most commonly linked to ear damage fall into a few categories:
- Certain antibiotics used for serious bacterial infections, particularly a class called aminoglycosides (including gentamicin and streptomycin), are among the most well-known ototoxic drugs.
- Chemotherapy drugs, especially platinum-based compounds used for cancer treatment, carry significant risk of hearing damage.
- Loop diuretics (water pills) prescribed for fluid retention or heart failure can affect the ear, particularly at high doses.
- Aspirin and related compounds can cause reversible tinnitus, usually at high doses taken regularly.
- Antimalarial drugs containing quinine are a rarer but documented cause.
With some of these medications, the ringing stops once you discontinue the drug. With others, particularly certain antibiotics and chemotherapy agents, the damage can be permanent. If you notice new ringing while taking any medication, that’s worth raising with whoever prescribed it.
Jaw and Neck Problems
The temporomandibular joint, where your jawbone meets your skull, sits remarkably close to the structures of your middle and inner ear. The jaw and middle ear share muscles, ligaments, and nerve pathways. When the jaw joint is inflamed, misaligned, or under chronic strain from clenching or grinding, that irritation can alter how sound is perceived. People with jaw disorders frequently report tinnitus alongside jaw pain, clicking, or difficulty opening their mouth fully.
This type of tinnitus often fluctuates with jaw activity. You might notice it worsens while chewing, yawning, or during periods of stress when you clench your jaw without realizing it. Treating the underlying jaw problem, whether through a bite guard, physical therapy, or reducing jaw tension, often reduces or eliminates the ringing.
Pulsatile Tinnitus: A Different Kind of Ringing
Most tinnitus is a continuous tone or hiss with no external source. Pulsatile tinnitus is different. It produces a rhythmic whooshing or thumping that matches your heartbeat. This type is caused not by hair cell damage but by changes in blood flow near the ear. One identified vascular cause is atherosclerotic carotid artery disease, where plaque buildup in the neck arteries creates turbulence that the ear picks up as sound.
Pulsatile tinnitus is worth taking seriously because it often points to a treatable underlying condition. Unlike the more common forms of tinnitus, it has a physical source that can sometimes be identified on imaging and addressed directly.
Ménière’s Disease
Ménière’s disease is an inner ear disorder that causes episodes of vertigo, fluctuating hearing loss, tinnitus, and a feeling of fullness or pressure in the ear. It results from abnormal fluid buildup in the inner ear, though exactly why this happens isn’t fully understood. People with Ménière’s often have trouble hearing low frequencies or a combination of low and high frequencies, while midrange hearing stays relatively intact.
The condition is episodic. Between vertigo attacks, balance typically returns to normal, though some people develop ongoing balance issues over time. Diagnosis involves hearing tests, balance testing, and sometimes a specialized test that measures fluid pressure in the inner ear. Because the symptoms overlap with other conditions, including brain tumors and multiple sclerosis, part of the diagnostic process is ruling those out through imaging and lab work.
Acoustic Neuroma
An acoustic neuroma is a noncancerous growth on the nerve that connects the inner ear to the brain. Tinnitus in only one ear is one of its hallmark symptoms, along with gradual hearing loss on the affected side. These tumors grow slowly, and symptoms can develop over months or years before anyone realizes what’s causing them. They’re uncommon, but they’re one of the reasons that persistent, one-sided tinnitus warrants investigation.
When Ringing Needs Urgent Attention
Most tinnitus develops gradually and, while bothersome, isn’t dangerous. But certain patterns signal something that needs prompt evaluation. Sudden hearing loss, defined as noticeable hearing decline in one ear over three days or fewer, is considered an ear emergency. It may be accompanied by tinnitus, ear fullness, or vertigo. Early treatment significantly improves the chances of recovering hearing, so any sudden change in hearing or new onset of ringing that doesn’t resolve quickly should prompt a same-day or next-day visit to a doctor or urgent care center.
One-sided tinnitus that persists, tinnitus accompanied by dizziness or facial numbness, and pulsatile tinnitus are all patterns that benefit from further workup rather than a wait-and-see approach.