Buzzing in the ears, known medically as tinnitus, is most often caused by some degree of hearing loss. When sensory cells in the inner ear are damaged by noise, aging, or other factors, the brain compensates by amplifying its own neural activity, creating a phantom sound you perceive as buzzing, ringing, or hissing. About 14% of adults worldwide experience tinnitus, and roughly 2% have a severe form that significantly affects daily life.
The causes range from everyday noise exposure to medications, blood pressure problems, and inner ear disorders. Understanding what’s behind the buzzing helps you figure out whether it’s temporary, manageable, or something that needs medical attention.
How the Brain Creates a Phantom Sound
Tinnitus isn’t actually a sound coming from your ear. It’s generated inside your brain. When the inner ear (cochlea) is damaged, it sends less signal to the brain’s auditory processing centers. In response, neurons in those centers do something counterintuitive: they turn up their own activity to compensate for the missing input. This process begins about seven days after cochlear damage occurs, and the increased neural firing tends to cluster around the frequency range where hearing loss is greatest.
Think of it like a radio amplifying static when it loses a station. Your brain is trying to restore a normal level of auditory input, but instead of recovering lost sound, it amplifies neural noise. That amplified noise is what you hear as buzzing. The process involves a shift in the balance between excitatory and inhibitory nerve signals: inhibition drops, firing rates climb, and the result is a persistent sound with no external source.
Noise Exposure and Age-Related Hearing Loss
The two most common triggers are prolonged noise exposure and age-related hearing loss, and they often overlap. Noise accounts for roughly one-third of all hearing loss cases globally, and people who work in loud environments frequently develop high-frequency hearing loss accompanied by tinnitus in one or both ears. Both the duration of noise exposure and the severity of hearing loss are strongly linked to tinnitus risk.
Sound becomes hazardous to your hearing at 85 decibels, which is about the level of heavy city traffic or a loud restaurant. The CDC’s occupational safety threshold is 85 decibels averaged over an eight-hour workday. Above that, the risk of permanent hearing damage climbs with every additional decibel and every extra hour of exposure. A single concert at 100+ decibels can cause temporary buzzing that resolves in hours or days, but repeated exposure at those levels causes cumulative, irreversible damage to the hair cells in your cochlea.
Age-related hearing loss works through a similar mechanism. As you get older, those same sensory hair cells gradually deteriorate. High-frequency hearing typically goes first, and tinnitus often follows. In study populations with a mean age in the late 50s to early 60s, noise-induced changes in the central auditory system were already well established.
Medications That Trigger Ear Buzzing
A number of common medications can cause tinnitus as a side effect. The good news is that in many cases, the buzzing resolves once the medication is stopped or the dose is reduced.
- Aspirin and NSAIDs: Aspirin is one of the most well-known culprits, and its effect is dose-dependent. At high doses (around 4.8 grams per day), it can cause 10 to 15 decibels of hearing loss, with continuous treatment pushing that to 40 to 50 decibels. Ibuprofen, naproxen, and indomethacin can also cause reversible hearing loss and tinnitus, though they’re less potent than aspirin.
- Certain antibiotics: Aminoglycoside antibiotics (a class used for serious infections) can cause hearing loss, dizziness, and tinnitus. Doxycycline and minocycline frequently cause tinnitus. Vancomycin can cause permanent hearing damage, while high-dose erythromycin typically causes temporary, reversible effects.
- Loop diuretics: These water pills, sometimes prescribed for heart failure or high blood pressure, are toxic to the cochlea at high doses and can induce hearing loss and tinnitus. The risk increases when they’re taken alongside aminoglycoside antibiotics.
- Chemotherapy drugs: Cisplatin is particularly ototoxic. About half of patients receiving it experience measurable hearing loss, usually at high frequencies, and tinnitus often appears before hearing loss shows up on a hearing test.
High Blood Pressure and Diabetes
Cardiovascular and metabolic conditions can damage the tiny blood vessels that supply your inner ear. High blood pressure has been linked to tinnitus since the 1940s, and the connection works through at least three pathways: direct damage to the inner ear’s microcirculation, side effects from blood pressure medications, and the perception of turbulent blood flow through narrowed vessels.
The structure most vulnerable to high blood pressure is the stria vascularis, a tissue in the cochlea that maintains the chemical environment hair cells need to function. When blood flow to this tissue is compromised, hearing suffers and tinnitus can develop. Diabetes compounds the problem. It damages the same small blood vessels and may also have direct metabolic effects on the cochlea. People with tinnitus who also have high blood pressure are more likely to have diabetes and high cholesterol as well, suggesting these conditions work together to worsen the buzzing.
Inner Ear and Jaw Disorders
Meniere’s disease is an inner ear condition that causes episodes of vertigo lasting 20 minutes to 12 hours, hearing loss (often in the low frequencies), and tinnitus or a feeling of fullness in the ear. It’s diagnosed based on this specific combination of symptoms plus confirmed hearing loss on a hearing test. The tinnitus in Meniere’s disease tends to fluctuate with the episodes rather than being constant.
Jaw joint problems (TMJ disorders) are another overlooked cause. Tinnitus that changes in pitch or volume when you clench your jaw, turn your eyes, or press on your head and neck is classified as somatic tinnitus. The jaw joint sits just millimeters from the ear canal, and dysfunction in the muscles and nerves around it can directly alter the auditory signals your brain receives.
Pulsatile Tinnitus: A Different Category
If the buzzing pulses in rhythm with your heartbeat, that’s pulsatile tinnitus, and it has different causes than the steady variety. In some cases, it’s caused by narrowing in the carotid or vertebral arteries, and another person can actually hear the sound coming from your ear with a stethoscope. This is called objective tinnitus, and it accounts for a small minority of cases.
Not all pulsatile tinnitus involves a structural vascular problem, though. Some people develop an increased awareness of normal blood flow near the ear, driven by changes in how the brain processes cardiac-related sensory input. Either way, pulsatile tinnitus that’s new or one-sided warrants medical evaluation because it can signal vascular abnormalities that are treatable.
When Buzzing Signals Something Serious
Most tinnitus is benign, but certain patterns are red flags. Buzzing that occurs in only one ear, especially when paired with gradual hearing loss on that side, loss of balance, or facial numbness, can indicate an acoustic neuroma (a noncancerous tumor on the nerve connecting the ear to the brain). About 9 out of 10 people with acoustic neuromas experience one-sided hearing loss, and tinnitus in the affected ear is a common early symptom.
Sudden hearing loss with tinnitus is another situation that needs prompt attention, because early treatment can sometimes restore hearing that would otherwise be permanently lost. One-sided symptoms, pulsatile tinnitus, and any buzzing accompanied by neurological changes like dizziness or facial weakness all point toward causes that benefit from imaging or specialized testing rather than a wait-and-see approach.