Tinnitus — Symptoms, Causes & Treatment | MyMedicPlus

Tinnitus is the perception of sound — most commonly described as ringing, buzzing, hissing, roaring, whistling, clicking, or pulsing — in the absence of an external acoustic source. It is one of the most prevalent audiological symptoms, affecting approximately 10-15% of adults in the general population, with 1-3% experiencing tinnitus severe enough to significantly impair quality of life, cause sleep disruption, or require specialist treatment. Tinnitus is classified as subjective (the most common form — only the patient perceives the sound; caused by aberrant neural activity in the auditory pathway) or objective (rare — a sound audible to an examiner with a stethoscope — caused by vascular or muscular processes such as a carotid bruit, arteriovenous malformation, or palatal myoclonus). Tinnitus is associated with sensorineural hearing loss in over 90% of cases — noise-induced hearing loss (NIHL) and presbycusis (age-related hearing loss) are the most common underlying conditions. Tinnitus is a symptom rather than a disease — it reflects dysfunction somewhere in the auditory pathway, from the cochlea to the auditory cortex. The exact neurological mechanism involves abnormal spontaneous neural firing in the auditory cortex in response to the cochlear damage — similar to phantom limb pain after amputation. Tinnitus associated with unilateral hearing loss or neurological symptoms requires urgent investigation to exclude acoustic neuroma (vestibular schwannoma).

Noise-induced hearing loss (NIHL): the most common cause — exposure to loud sound (occupational: construction, farming, military; recreational: concerts, headphones, power tools) above 85 decibels causes cochlear hair cell damage; cochlear injury triggers abnormal neural activity perceived as tinnitus. Presbycusis (age-related sensorineural hearing loss): universal hearing decline with ageing — onset from age 50, with high-frequency loss predominating; tinnitus is very common in older adults. Meniere's disease: endolymphatic hydrops causing episodic vertigo, fluctuating unilateral hearing loss, aural fullness, and tinnitus — triad of tinnitus, hearing loss, and vertigo. Acoustic neuroma (vestibular schwannoma): benign tumour of the vestibular nerve — unilateral progressive tinnitus with unilateral hearing loss is a red flag requiring MRI IAM. Otosclerosis: abnormal bone remodelling in the middle ear causing conductive hearing loss and tinnitus. Cerumen impaction: excessive ear wax blocking the external auditory canal — resolves with wax removal. Otitis media: middle ear infection or effusion ('glue ear') causes conductive hearing loss and tinnitus. TMJ dysfunction: temporomandibular joint disorders cause somatic tinnitus — modulated by jaw movement. Cervical spondylosis: somatic tinnitus linked to neck muscle tension. Ototoxic medications: aminoglycoside antibiotics (gentamicin, tobramycin), platinum-based chemotherapy (cisplatin — affects up to 80% of patients), loop diuretics at high doses (furosemide), high-dose aspirin (above 3g/day — reversible), quinine, and vancomycin. Pulsatile tinnitus: carotid artery stenosis, arteriovenous malformation (AVM), glomus jugulare tumour, intracranial hypertension (IH — bilateral pulsatile tinnitus with headache and papilloedema), and sigmoid sinus dehiscence.

Tinnitus presents with a wide range of perceived sounds that may be constant or intermittent, unilateral (in one ear — more clinically concerning) or bilateral (both ears, or centrally perceived in the head). Common sound qualities: high-pitched ringing or hissing (most typical of NIHL and presbycusis); buzzing, roaring, or low-pitched sounds (Meniere's disease); clicking sounds (palatal myoclonus, TMJ dysfunction); and pulsatile sounds synchronous with the heartbeat (pulsatile tinnitus — requires vascular workup for carotid stenosis, AVM, or intracranial hypertension). Hyperacusis (abnormal sensitivity to normal sound volumes, leading to discomfort or pain from everyday sounds) accompanies tinnitus in approximately 40% of patients — caused by the same loss of cochlear gain control that underlies tinnitus. Functional impact: sleep disturbance is the most common and debilitating consequence — tinnitus is perceived most intensely in quiet environments, making sleep initiation difficult; concentration and cognitive function suffer from the constant distraction of the perceived sound; occupational impairment is significant in 1-2% of patients. Psychological sequelae: anxiety, depression, catastrophic thinking about tinnitus, and social withdrawal are present in 30-40% of those with significant tinnitus. Tinnitus Handicap Inventory (THI) is a validated 25-item questionnaire quantifying tinnitus severity (0-100 scale — above 56 represents severe tinnitus).

Complete audiological evaluation: pure-tone audiogram (air and bone conduction across 250-8000 Hz — identifies the pattern and degree of hearing loss; NIHL shows characteristic high-frequency 'notch' at 4000 Hz); speech discrimination score; tympanometry (assesses middle ear pressure and eardrum mobility — flat type B tympanogram in middle ear fluid); acoustic reflex testing; and otoacoustic emissions (OAEs — cochlear hair cell function). Tinnitus pitch and loudness matching: audiologist identifies the frequency (pitch) and loudness equivalent of the patient's tinnitus — most tinnitus is of low intensity (within 10 dB above hearing threshold); minimum masking level determines required sound therapy level. MRI with gadolinium (internal auditory meati and posterior fossa): essential for all cases of unilateral tinnitus, unilateral hearing loss, or pulsatile tinnitus — excludes acoustic neuroma, other cerebellopontine angle tumours, and vascular causes. MRA or CT angiography (CTA): for pulsatile tinnitus — identifies carotid stenosis, arteriovenous malformation, dural arteriovenous fistula, glomus tumour, or sigmoid sinus dehiscence. Blood pressure measurement: hypertension is a common treatable cause of pulsatile tinnitus. Thyroid function tests: hypo- and hyperthyroidism can cause tinnitus. TMJ assessment: by dental or maxillofacial specialist for somatic tinnitus worsened by jaw movement. Intracranial pressure assessment: lumbar puncture opening pressure for suspected idiopathic intracranial hypertension (IIH) — typically in overweight women with bilateral pulsatile tinnitus, papilloedema, and headache.

There is currently no pharmacological cure for chronic subjective tinnitus. Management aims at reducing tinnitus-related distress and achieving habituation — the process by which the brain learns to reclassify tinnitus signals as non-threatening, reducing their emotional impact and conscious perception. Treat the underlying cause: wax removal by microsuction or irrigation (often immediately resolves tinnitus from cerumen impaction); discontinuation or dose reduction of ototoxic medications where clinically feasible; antifungal or antibiotic treatment for otitis media; management of TMJ disorders with dental appliances; thyroid hormone replacement; BP treatment. Hearing aids: the most important intervention for tinnitus with hearing loss — amplifying environmental sounds reduces the salience of tinnitus by providing auditory stimulation to the deprived cochlea; most modern hearing aids include tinnitus masking features (sound generators, fractal tones). Sound therapy: broad-band white noise or pink noise generators worn in or behind the ear at the 'mixing point' (just below the loudness of the tinnitus, not masking it); tabletop sound machines for night-time use; notched music therapy (music digitally filtered to remove the tinnitus frequency — shown to reduce cortical representation of that frequency). Tinnitus Retraining Therapy (TRT): a structured 12-24 month programme combining directive counselling (explaining the neurophysiological model of tinnitus — demystifying and reducing fear) with continuous broadband sound therapy; aims for 'habituation of reaction' (emotional response) and 'habituation of perception' (awareness); 80% success in long-term follow-up studies. Cognitive Behavioural Therapy (CBT): the highest-quality evidence base for reducing tinnitus-related distress, anxiety, depression, and functional disability — NICE endorsed; does not reduce tinnitus loudness but significantly reduces its impact; typically 6-12 sessions with an audiological or clinical psychologist. Mindfulness-based stress reduction (MBSR): reduces tinnitus-related distress and catastrophic thinking. Avoid silence: always have some background environmental sound (fan, nature sounds) — especially at night.

Severe tinnitus causes significant insomnia (disrupted sleep initiation and maintenance in up to 70% of patients — tinnitus is most intrusive in silence, making it the dominant auditory percept when competing environmental sounds are absent; regular nocturnal sound enrichment is essential management). Concentration and working memory difficulties from the continuous attentional demand of the perceived sound impair occupational performance — tinnitus-related presenteeism and absenteeism have significant economic impact. Clinically significant depression (PHQ-9 score above 10) affects approximately 40% of those with severe tinnitus — driven by the chronic, inescapable nature of the symptom and the catastrophic interpretation that it will worsen or never resolve; CBT and TRT specifically target catastrophic thinking. Anxiety disorders affect 45-50% — often amplifying tinnitus perception through heightened limbic system activation, creating a self-reinforcing distress cycle. Social withdrawal and isolation (avoiding noisy environments, difficulty communicating in background noise when tinnitus is superimposed on sensorineural hearing loss). Suicidal ideation occurs in 1-2% of patients with the most severe and refractory tinnitus — all patients scoring severely on the Tinnitus Handicap Inventory (THI above 56) should be screened with PHQ-9 and referred for urgent psychiatric assessment if suicidal ideation is identified. In elderly patients with combined tinnitus and hearing loss, the additive cognitive load of tinnitus and hearing loss significantly increases dementia risk — hearing aid fitting and tinnitus management should not be delayed.

Hearing protection (earplugs/earmuffs) in occupational or recreational noise exposure >85 dB. Avoid continuous headphone use at high volumes (limit to 60% volume, 60 minutes). Prompt treatment of ear infections and cerumen impaction. Avoid ototoxic medications when alternatives exist. Stress management (stress amplifies tinnitus perception). Caffeine reduction trial in those who notice a relationship. Regular audiological monitoring for progressive hearing loss. Sustained lifestyle modifications — maintaining a healthy body weight through balanced diet and regular physical activity, avoiding tobacco smoking, limiting alcohol intake, and managing chronic conditions such as hypertension and diabetes — are foundational strategies for reducing the risk of this condition and its complications. Regular health screening in at-risk populations, rigorous adherence to prescribed preventive medications, and proactive monitoring of established risk factors are equally critical and complementary components of a comprehensive and effective long-term prevention strategy.

See a GP for any new persistent tinnitus lasting more than a few days, particularly if accompanied by hearing loss, vertigo, or fullness in the ear. All new tinnitus should be assessed to identify and treat any correctable underlying cause (wax impaction, middle ear fluid, medication side effect). Urgent GP review or emergency department assessment is required for: sudden onset hearing loss with or without tinnitus — sudden sensorineural hearing loss (SSNHL) is a medical emergency requiring high-dose oral or intratympanic corticosteroids within 72 hours of onset to maximise hearing recovery; sudden tinnitus following noise exposure or head trauma; and tinnitus after use of aminoglycoside antibiotics or platinum-based chemotherapy (ototoxicity). Seek urgent ENT referral for: unilateral tinnitus, particularly if progressive or associated with unilateral hearing loss and vertigo — MRI of the internal auditory meati is required to exclude acoustic neuroma; pulsatile tinnitus synchronous with the heartbeat (vascular workup required — CT angiography, MRA); and severe tinnitus causing suicidal ideation (this requires urgent psychiatric input).