If you live with a constant ringing, buzzing or hissing in your ears, you know how frustrating tinnitus can be. You also know that doctors have no lab test for it. Diagnosis relies on what you describe. A small new study suggests that may change one day, after researchers found that people with tinnitus had higher levels of a specific ear protein in their blood.
Key Takeaways
- People with tinnitus had about 50% higher blood levels of prestin, a protein found in the inner ear’s hair cells, than people without tinnitus.
- Prestin levels may reflect how severe tinnitus is, according to the lead researcher.
- The study included 82 adults, about half with tinnitus, and was published in Otolaryngology–Head and Neck Surgery in 2026 by researchers at the University of Connecticut.
- The blood test isn’t ready for use. In this small group, prestin couldn’t reliably tell who had tinnitus and who didn’t.
- The researchers hope the finding could eventually lead to new treatments for a condition that currently has no cure.
What the study found
Tinnitus affects roughly 1 in 10 U.S. adults. It’s often linked to hearing loss, loud noise exposure and aging, but it can be hard to diagnose and measure because the sound is only heard by the person who has it.
Researchers at the University of Connecticut, led by otolaryngologist Kourosh Parham, measured prestin in the blood of 82 adults, about half of whom had tinnitus.
Prestin is a “motor” protein found in the outer hair cells of the cochlea, the snail-shaped part of the inner ear. It helps these cells change shape and amplify sound. When hair cells are damaged, for example by loud noise, prestin can leak into the bloodstream.
People with tinnitus had blood prestin levels about 50% higher than those without it. The lead researcher said the findings offer proof of concept that an ear protein may play a central role in tinnitus, and that measuring it may give doctors a clinical indication of how severe someone’s tinnitus is.
The study builds on earlier work by the same team, which linked prestin in the blood to damage in the inner ear.
Why this matters
Right now, doctors diagnose tinnitus based on patient questionnaires and hearing tests. An objective blood test could:
- Help confirm a diagnosis and track whether tinnitus is getting better or worse
- Help researchers test new treatments by giving them a measurable target
- Point to inner-ear damage as a source of tinnitus in some people
The researchers describe the finding as a first step toward developing drugs to help manage tinnitus.
What the study can’t tell us
This was a small observational study, so it can’t show that higher prestin levels cause tinnitus. Prestin levels also overlapped between the two groups, so the test couldn’t reliably sort people into “tinnitus” and “no tinnitus” in this sample.
Tinnitus has many possible causes, and not all of them start in the cochlea. Some people’s tinnitus is linked to the jaw, neck, blood flow, medications or changes in how the brain processes sound. The researchers suggest that some participants may have had tinnitus from causes other than inner-ear damage, which may explain why prestin didn’t work as a test for everyone. Larger studies are needed.
What you can do now if you have tinnitus
While there’s no cure, many people find relief with treatment:
- Get a hearing test. Tinnitus often comes with hearing loss, and hearing aids can make the ringing less noticeable for many people.
- Ask about sound therapy. Background noise, white noise machines or apps can help mask tinnitus, especially at night.
- Consider cognitive behavioral therapy (CBT). It has some of the strongest evidence for reducing how much tinnitus bothers people.
- Protect your ears. Wear earplugs or earmuffs around loud noise, and keep headphone volume low to avoid further damage.
- Review your medications. Some drugs, including high doses of aspirin and certain antibiotics, can cause or worsen tinnitus. Don’t stop any medicine without talking to your doctor.
- Manage stress and sleep, which can make tinnitus feel louder.
See a doctor promptly if tinnitus comes on suddenly, affects only one ear, pulses with your heartbeat, or comes with sudden hearing loss, dizziness or facial weakness. These can be signs of a condition that needs urgent care.
This isn’t a substitute for medical advice. Talk to your doctor or an audiologist about your symptoms.
Sources:
- Parham K, et al. Otolaryngology–Head and Neck Surgery, 2026. doi:10.1002/ohn.70382
- ScienceAlert: Scientists identified a biological signature of tinnitus, and it’s in your blood. November 8, 2026.
- National Institute on Deafness and Other Communication Disorders. Tinnitus.