Ringing in the ears, known medically as tinnitus, is the perception of sound when no external sound is present. It affects millions of people and in roughly 8 to 9 out of 10 cases of chronic tinnitus, an underlying hearing loss is the root cause. The sound isn’t always a ring. It can be a buzz, hiss, whoosh, or hum, and it can range from a mild background noise to something that disrupts sleep and concentration.
Why Your Brain Creates Phantom Sound
Tinnitus usually starts with damage to the tiny hair cells inside your inner ear. These cells convert sound waves into electrical signals for your brain. When some of them stop working, whether from aging, noise exposure, or other causes, a gap forms in the signals reaching your brain’s hearing centers.
Your brain doesn’t leave that gap alone. It reorganizes itself, and the frequency regions next to the damaged area expand into the vacated space and become overrepresented. Neurons in those zones lose their normal inhibitory input and begin firing on their own at elevated rates. This spontaneous, hyperactive signaling is what you perceive as ringing or buzzing. It’s essentially the auditory version of phantom limb pain: your brain “fills in” missing input with a sensation that isn’t there. Research published in the journal Neuron found that while hyperactivity can occur in the brainstem, it’s this cortical remapping that forms the basis of a chronic tinnitus percept.
The Most Common Causes
Age-related hearing loss is the single most common trigger. As the hair cells in your inner ear gradually deteriorate over decades, the brain’s compensation produces that familiar ringing. You may not even realize you have hearing loss until tinnitus shows up first.
Loud noise is the second major cause. A single blast of sound, like gunfire or a front-row concert, can damage hair cells in an instant. So can years of working around heavy machinery or using power tools. OSHA’s permissible exposure limit is 90 decibels for an 8-hour workday, but NIOSH recommends keeping it below 85 decibels. At 100 decibels (roughly the level of a loud nightclub), NIOSH recommends no more than 15 minutes of exposure per day.
Other common causes include earwax buildup, ear infections, jaw or bite problems, and certain medications. High doses of aspirin, some antibiotics (particularly macrolide types like azithromycin when used long-term at high doses), certain chemotherapy drugs, and loop diuretics used for heart failure or kidney disease can all trigger tinnitus as a side effect. If ringing starts after beginning a new medication, that’s worth flagging with your prescriber.
Subjective vs. Pulsatile Tinnitus
The vast majority of tinnitus is subjective, meaning only you can hear it. There’s no actual sound being produced in your body. It’s a signal created entirely within your auditory system.
Objective tinnitus is exceedingly rare. It involves real, measurable sound generated by blood flow or muscle contractions near the ear, and a doctor can sometimes hear it with a stethoscope. The most recognizable form is pulsatile tinnitus, a rhythmic whooshing or thumping that beats in sync with your heartbeat. Most people with pulsatile tinnitus have a benign venous hum, but it can also point to blood vessel abnormalities, so it warrants a medical evaluation.
Warning Signs That Need Prompt Attention
Most tinnitus is not dangerous. But certain patterns are red flags. Tinnitus in only one ear is one of them. Most tinnitus is bilateral, and unilateral tinnitus is a common presenting sign of both acoustic neuroma (a benign tumor on the hearing nerve) and Ménière’s disease.
If ringing comes with sudden hearing loss in one ear, that’s considered an otologic emergency. Idiopathic sudden sensorineural hearing loss can sometimes be reversed if treated within hours to days, so same-day evaluation matters. Other urgent signs include tinnitus accompanied by facial weakness, severe dizziness or vertigo, persistent ear pain or drainage, or sudden onset pulsatile tinnitus. Any of these combinations can indicate a serious underlying condition, from cerebrovascular disease to a tumor, and should be evaluated quickly by a specialist.
How Tinnitus Is Diagnosed
A standard hearing test is usually the first step. You sit in a soundproof room wearing earphones and indicate when you hear specific tones. The results show whether you have hearing loss and in which frequency ranges, which often correlates directly with the pitch of your tinnitus.
Your doctor may also ask you to move your eyes, clench your jaw, or turn your neck. If these movements change the tinnitus, it suggests a musculoskeletal or neurological component that can guide treatment. Blood tests can check for anemia, thyroid problems, or vitamin deficiencies that occasionally contribute. If there’s concern about a structural cause, particularly with unilateral or pulsatile tinnitus, CT or MRI imaging may follow.
Treatment and Management
There is no pill that cures tinnitus. Treatment focuses on reducing how much the sound bothers you and how often you notice it. For many people, this works remarkably well over time.
Cognitive behavioral therapy is the most evidence-supported treatment for tinnitus distress. It doesn’t eliminate the sound itself, but it changes the emotional and cognitive response to it. By breaking the cycle of anxiety, frustration, and hypervigilance that makes tinnitus feel louder and more intrusive, CBT can significantly reduce how much tinnitus affects daily life.
Tinnitus retraining therapy combines educational counseling with low-level background sound from wearable devices. The idea is to train your brain to classify tinnitus as a neutral signal rather than a threat. A large randomized trial from Johns Hopkins found that about half of participants across all treatment groups showed clinically meaningful improvement at 18 months, though the specialized sound generators didn’t outperform standard care when both groups received counseling. This suggests the counseling component may be doing most of the heavy lifting.
If hearing loss is involved, hearing aids often help by restoring the missing input your brain has been compensating for. Many people find their tinnitus fades into the background once they can hear external sounds more clearly again. Sound therapy, whether through a dedicated device, a fan, or a white noise app, works on a similar principle by giving your brain competing input so it pays less attention to the phantom signal.
Protecting Your Hearing
Since noise exposure is one of the few fully preventable causes of tinnitus, ear protection is the most direct thing you can do. Foam earplugs, over-ear muffs, or custom-molded musician’s plugs all reduce decibel exposure significantly. The key detail most people miss is duration: every 3-decibel increase in noise doubles the effective dose, so even moderately loud environments become risky over long stretches. If you need to raise your voice to be heard by someone an arm’s length away, the environment is loud enough to cause damage over time.
For people who already have tinnitus, protecting remaining hearing is just as important. Further noise damage tends to make existing tinnitus worse and harder to manage.