Your ear contains some of the smallest true joints in the human body, and those joints can develop arthritis just like a knee or a knuckle. The tiny bones of the middle ear connect through synovial joints lined with the same tissue that becomes inflamed in rheumatoid arthritis, and the cartilage of the outer ear can be targeted by other inflammatory conditions. Most people never think of the ear as a place where arthritis lives, but several forms of the disease can cause ear pain, hearing loss, or both.
The Joints You Did Not Know You Had
Deep inside each ear, three tiny bones called ossicles transmit sound vibrations from the eardrum to the inner ear. These bones, the malleus, incus, and stapes, are connected by two joints: the incudomalleolar joint (between the malleus and incus) and the incudostapedial joint (between the incus and stapes). Both are classified as diarthrodial joints, meaning they have a synovial lining, a joint capsule, and articular cartilage. In other words, they are built like miniature versions of the joints in your fingers or jaw.1PubMed Central. The Effect of Rheumatoid Arthritis on Middle and Inner Ear Functions
Because these joints are synovial, any systemic disease that targets synovial tissue can reach them. That includes rheumatoid arthritis, osteoarthritis, psoriatic arthritis, and even gout. The ear also has abundant cartilage in its outer structure, making it vulnerable to conditions like relapsing polychondritis that attack cartilage throughout the body. The result is a surprisingly long list of arthritis-related conditions that can show up in or around the ear.
Rheumatoid Arthritis and the Middle Ear
Rheumatoid arthritis is the form most clearly documented to affect the ossicular joints. In RA, the immune system attacks the synovial lining of joints, producing an overgrowth of inflamed tissue called pannus. When pannus forms inside the incudomalleolar or incudostapedial joint, it accumulates on the disc and articular surface, stiffening or eroding the connection between the tiny bones.1PubMed Central. The Effect of Rheumatoid Arthritis on Middle and Inner Ear Functions The ossicles need to vibrate freely to transmit sound. When arthritis locks them up or damages their surfaces, the mechanical chain breaks down and hearing suffers.
Animal research has shown just how dramatic the damage can be. In mice with collagen-induced arthritis (a standard model for RA), the space between the incus and stapes shrank by more than half compared to healthy controls. The stapes itself developed hundreds of tiny closed pores that occupied about 12% of the bone’s volume, versus less than 1% in healthy animals.2PubMed Central. Ossicular Bone Damage and Hearing Loss in Rheumatoid Arthritis: A Correlated Functional and High Resolution Morphometric Study in Collagen-Induced Arthritic Mice That level of structural decay in a bone smaller than a grain of rice helps explain why hearing problems crop up in people with RA even when the ears seem fine on a routine exam.
RA does not limit itself to the middle ear. A systematic review confirmed that the disease can affect both the middle ear’s ossicular joints and the inner ear’s cochlea and acoustic nerve at the same time.3PubMed Central. Audiological Features in Patients with Rheumatoid Arthritis: A Systematic Review This dual involvement means a person with RA might experience both the mechanical hearing problems caused by stiff joints and the nerve-related hearing problems caused by inner ear inflammation, potentially in the same ear.
What Kind of Hearing Loss Shows Up
Hearing loss comes in different flavors, and distinguishing among them matters for understanding how arthritis affects the ear. Conductive hearing loss happens when something blocks or stiffens the mechanical pathway from the eardrum to the inner ear. Sensorineural hearing loss happens when the nerve cells in the cochlea or the auditory nerve itself are damaged. Mixed hearing loss is a combination of both.
You might assume that arthritis in the ossicular joints would mainly cause conductive hearing loss, since those joints are part of the mechanical transmission chain. But the evidence tells a more surprising story. A meta-analysis pooling data from multiple studies found that RA patients had roughly three and a half times the odds of sensorineural hearing loss compared to people without RA. Conductive and mixed hearing loss, on the other hand, were not significantly increased.4PubMed. Association of rheumatoid arthritis with hearing loss: a systematic review and meta-analysis
This is a bit counterintuitive. The explanation seems to be that while RA does affect the ossicular joints, the inner ear damage from vasculitis (inflammation of small blood vessels) and immune-mediated injury to the cochlea plays a bigger role in measurable hearing loss. The prevalence of sensorineural hearing loss among RA patients has been estimated at anywhere from 25% to 72% across studies, a wide range that reflects differences in how hearing was tested and what counted as impaired.5Exploration of Immunology. Decoding the impact of autoinflammatory/autoimmune diseases on inner ear harmony and hearing loss Even at the low end, that is a substantial fraction of patients experiencing hearing changes that often go unrecognized.
Osteoarthritis and the Aging Ear
Osteoarthritis is the wear-and-tear form of joint disease, and it can reach the ossicular joints too. A study examining temporal bone specimens from people with age-related hearing loss found measurable changes in the ossicular joints. In cases where the hearing loss had a conductive component (called “inner ear conductive presbycusis”), the synovial space in the incudomalleolar joint was wider than in age-matched controls or in ears with purely sensorineural age-related hearing loss.6PubMed Central. Ossicular joint histopathology in cases of age-related hearing loss A widened synovial space suggests the joint cartilage and surfaces are breaking down, loosening the connection between the bones.
Separately, research on elderly patients found that osteoarthritis was a predictor of subclinical middle ear malfunction. These are changes picked up on testing that the person may not yet notice as obvious hearing trouble.7PubMed Central. Sub-clinical middle ear malfunctions in elderly patients; prevalence, pattern and predictors The idea is straightforward: as cartilage at the ossicular joints degenerates (the same process that wears down cartilage in larger joints), the repair response produces changes in stiffness and compliance that affect how well the middle ear transmits sound.
There is also an interesting overlap with otosclerosis, a condition where abnormal bone remodeling stiffens the stapes. A pathology study found that stapes removed during surgery for otosclerosis often showed features of osteoarthritis, including surface fissuring in about two-thirds of specimens, cartilage erosion in about half, and occasional osteophyte (bone spur) formation.8PubMed Central. The Stapes in Otosclerosis: Osteoarthritis of an Ear Ossicle The researchers proposed that persistent vibration superimposed on the rigid, disease-stiffened bone may have driven these arthritic changes, a reminder that even the body’s tiniest joints respond to mechanical stress.
Relapsing Polychondritis and the Outer Ear
Not all ear-related arthritis is hidden inside the middle ear. Relapsing polychondritis is a rare autoimmune disease that attacks cartilage throughout the body, and the ear is its most common first target. Inflammation of the ear cartilage, called auricular chondritis, produces red, swollen, painful ears that can look a lot like a skin infection. If the episodes keep recurring, the cartilage can be permanently destroyed, leaving a floppy, misshapen ear sometimes described as a “cauliflower ear.”9PubMed. Relapsing polychondritis
The disease is uncommon but potentially serious, and it is associated with joint inflammation elsewhere in the body. About a third of people with relapsing polychondritis also meet criteria for another rheumatic disease. The ear involvement often leads patients to see a dermatologist or an ENT specialist rather than a rheumatologist, which contributes to diagnostic delay. In one Chinese cohort, 72% of patients were misdiagnosed at their first visit, all by non-rheumatology specialists.10PubMed. Diagnosing relapsing polychondritis remains a common challenge: experience from a Chinese retrospective cohort A red, painful ear that does not respond to antibiotics and keeps coming back should raise the suspicion of polychondritis, especially if the patient also has joint pain or nasal cartilage involvement.
Gout in the Ear
Gout, caused by the buildup of uric acid crystals in joints, most famously attacks the big toe. But gout’s crystal deposits (called tophi) can form in unexpected places, including the ear. Small white or yellowish nodules on the outer ear are actually one of the classic signs of long-standing gout, though they are less common now than they were decades ago because treatment has improved.
More unusually, tophi have been documented inside the middle ear itself. A case report described a patient who underwent surgery for what appeared to be a middle ear mass, which turned out on pathology to be tophi containing monosodium urate crystals.11PubMed. An Unusual Presentation of Gout: Tophi in the Middle Ear This is rare enough to merit a published case report, but it illustrates the broader point: if arthritis-related deposits can form in a space as small as the middle ear cavity, essentially any joint-targeting disease has the potential to cause ear symptoms under the right circumstances.
When Jaw Arthritis Mimics Ear Disease
The temporomandibular joint sits immediately in front of the ear canal. There is an intimate anatomic relationship between the TMJ and the structures of the external ear, middle ear, and eustachian tube. When the TMJ becomes arthritic, whether from osteoarthritis, rheumatoid arthritis, or mechanical dysfunction, the resulting inflammation and structural changes can produce symptoms that feel like they are coming from the ear itself: pain, fullness, muffled hearing, ringing, and even dizziness.
A case report documented a patient with unilateral ear fullness and temporary hearing loss who had been cleared of ear infection and other ear-related diagnoses. The symptoms turned out to be caused by TMJ dysfunction and resolved with treatment directed at the jaw joint.12PubMed. Unilateral ear fullness and temporary hearing loss diagnosed and successfully managed as a temporomandibular disorder: a case report This is worth knowing because TMJ problems are common, and the ear symptoms they cause can lead patients and clinicians on a long detour through ENT evaluations before someone thinks to check the jaw. If you have ear fullness or ear pain and your hearing tests and ear exams come back normal, asking about your jaw joint is a reasonable next step.
Psoriatic Arthritis and Inner Ear Function
Psoriatic arthritis, which combines joint inflammation with the skin condition psoriasis, has also been linked to inner ear changes. A study comparing patients with psoriatic arthritis to healthy controls found reduced hearing function at higher frequencies (in the 4,000 to 6,000 Hz range) and abnormal outer hair cell function measured by otoacoustic emissions at 3,000 and 4,000 Hz.13Auris Nasus Larynx. Functions of the inner ear in psoriatic arthritis These are subclinical changes, meaning patients might not yet notice them in everyday conversation. But they suggest the inflammatory process of psoriatic arthritis is reaching the inner ear and damaging the delicate cells responsible for detecting high-pitched sounds.
High-frequency hearing loss tends to be the earliest sign of inner ear damage in most inflammatory conditions. Because everyday speech relies heavily on lower frequencies, people often do not realize their hearing is deteriorating until the damage has progressed substantially. For someone with psoriatic arthritis or another inflammatory arthritis, periodic audiometric testing could catch these changes early.
Children Are Not Exempt
Arthritis affecting the ear is not limited to adults. A study of children with juvenile idiopathic arthritis found evidence of a dual effect on both the middle and inner ear. The children showed abnormal tympanograms (a test of middle ear compliance) alongside worse hearing thresholds at low frequencies, suggesting subclinical middle ear involvement. At the same time, hearing losses at high frequencies and at very high frequencies above the normal speech range pointed to early inner ear damage.14PubMed. Hearing loss and middle ear involvement in patients with juvenile idiopathic arthritis
The word “subclinical” keeps coming up, and it matters. These changes typically do not announce themselves with obvious symptoms. A child with juvenile arthritis may not complain of hearing problems, and a standard school hearing screening might not catch the high-frequency loss. The implication is that children with active inflammatory arthritis could benefit from more detailed hearing evaluations than they routinely receive.
What Can Be Done About It
Treatment depends on which type of arthritis is involved and which part of the ear is affected. For RA-related inner ear damage, controlling the underlying disease with disease-modifying medications often helps stabilize hearing. The same immunosuppressive drugs used for joint inflammation reduce the vascular and immune-mediated damage happening in the cochlea. In one documented case of SAPHO syndrome (a rare inflammatory bone and joint condition), hearing deteriorated when steroid therapy was tapered but recovered after cyclosporine was started. When the ossicular joints had already sustained irreversible damage, ossicular reconstruction surgery improved both hearing and ear pain.15PubMed. Fluctuating mixed-type hearing loss associated with synovitis-acne-pustulosis-hyperostosis-osteomyelitis (SAPHO) syndrome
For relapsing polychondritis, treatment typically involves corticosteroids during flares and sometimes longer-term immunosuppression to prevent cartilage destruction. Catching it early matters because once the ear cartilage is gone, it does not regenerate, and hearing loss caused by chronic middle ear damage may not fully reverse.
For TMJ-related ear symptoms, the treatment is directed at the jaw: physical therapy, bite guards, anti-inflammatory medications, and sometimes injections into the joint. When the underlying TMJ problem is addressed, the ear symptoms often resolve without any ear-specific treatment.
If you have an inflammatory arthritis and notice changes in hearing, a sense of ear fullness, tinnitus, or ear pain that does not seem to be an infection, it is worth bringing up with your rheumatologist. These symptoms tend to fall through the cracks because they straddle two specialties: rheumatology and otolaryngology. Neither specialist may think to ask about the other’s territory unless the patient connects the dots.
Otosclerosis and the Arthritis Question
Otosclerosis deserves a brief mention because it sometimes gets confused with arthritis in discussions of ear bone disorders. Otosclerosis is not arthritis per se. It is a condition in which abnormal bone remodeling causes the stapes to fuse to the surrounding bone, preventing it from vibrating. The process involves bone resorption and new bone formation in the temporal bone, more like Paget’s disease in miniature than classic joint inflammation.8PubMed Central. The Stapes in Otosclerosis: Osteoarthritis of an Ear Ossicle
That said, as mentioned earlier, many otosclerotic stapes specimens show osteoarthritic changes on close examination. The relationship is probably secondary: once the stapes is locked in place by the otosclerotic bone, the abnormal mechanical stresses on the remaining joint surfaces promote cartilage breakdown. This is not a cause the typical reader needs to worry about, but it is a good example of how joint degeneration can happen in tiny structures most people never think about. The ear, it turns out, is just another place where bones meet and where things can go wrong at the joint.