The tinnitus that comes from the muscle, not the ear

A constant ringing in the ear, sensation of plugged ear, ear pressure — and all audiologic tests normal. This is the story of a significant share of patients with tinnitus: the origin is not in the cochlea or the auditory nerve, but in the masticatory and cervical muscles. This subtype is called somatosensory tinnitus because it can be modulated — increased, decreased, or altered in tone — by movements of the jaw, neck, or pressure on specific points.

The masseter, the pterygoids, and the sternocleidomastoid (SCM) are the most frequently involved muscles. Trigger points in these structures can generate referred periauricular pain, sensation of fullness in the ear, and ipsilateral tinnitus. When this somatosensory component exists, treatment with dry needling and electroacupuncture in these muscles can complement the conventional audiologic approach — acting on one of the possible sources of the symptom. The therapeutic decision is individualized by the physician.

How masticatory muscles generate tinnitus

  1. Convergence in the trigeminal nucleus

    The caudal trigeminal nucleus receives afferents both from masticatory muscles (via trigeminal nerve V3) and from central auditory pathways. Trigger points in the masseter and pterygoids generate nociceptive hyperactivity that "spills over" to auditory pathways through this convergence, generating perception of sound without real stimulus.

  2. Tensor tympani and stapedius muscle

    The tensor tympani is innervated by the trigeminal (V3) and the stapedius by the facial (VII). Trigger points in the masseter can generate reflex spasm of the tensor tympani via the trigeminal arc, altering the tension of the tympanic membrane and producing a sensation of plugged ear and low-frequency tinnitus.

  3. SCM and referred periauricular pain

    The sternal belly of the SCM refers pain deeply into the ear. Trigger points in this belly generate sensation of pressure, ear fullness, and ipsilateral tinnitus — frequently confused with otitis média or tubal dysfunction.

  4. Lateral pterygoids and TMJ

    The lateral pterygoids, located deeply in the infratemporal fossa, refer pain to the temporomandibular joint and ear. In patients with bruxism or dental clenching, these muscles are chronically overloaded and contribute both to TMD and to tinnitus.

Epidemiology of somatosensory tinnitus

Relevant share
OF PATIENTS WITH TINNITUS
are able to modulate tinnitus with jaw or neck movements — indicating somatosensory component; this subtype is increasingly recognized in the otoneurologic literature
Frequent association
WITH TMD
patients with temporomandibular dysfunction report tinnitus at a prevalence above the general population — a clinical marker of the shared somatosensory pathway
4–8 sessions
(REFERENCE)
of medical acupuncture focused on masseter, SCM, and pterygoids is usually the point at which the response in somatosensory tinnitus is assessed — individual response varies
Improvement described
IN SERIES
of somatosensory tinnitus in patients treated with dry needling of the masticatory and cervical muscles, according to case series — controlled trials are still scarce

Recognizing tinnitus of muscular origin

Critérios clínicos
07 itens

Typical pattern of somatosensory tinnitus

  1. 01

    Tinnitus that changes intensity when clenching the teeth or opening the mouth

  2. 02

    Sensation of plugged ear with normal audiometry

  3. 03

    Tinnitus that worsens in periods of stress or dental clenching

  4. 04

    Pain in the jaw region or in front of the ear associated with tinnitus

  5. 05

    Stiff and painful neck on the same side as the tinnitus

  6. 06

    Tinnitus that appeared after prolonged dental treatment or jaw trauma

  7. 07

    Sensation of ear pressure that does not improve with decongestants

Myths and facts about tinnitus and plugged ear

Myth vs. Fact

MYTH

If the audiologic exam is normal, tinnitus is psychological

FACT

Audiologic exams assess cochlear and auditory neural function. Somatosensory tinnitus has its origin in muscles and joints that are not assessed by these exams. It is not psychological — it is musculoskeletal. Modulation of tinnitus by jaw or neck movements is objective clinical evidence of somatosensory origin.

MYTH

Plugged ear always indicates an Eustachian tube problem

FACT

Tubal dysfunction is a real cause of the sensation of plugged ear, but it is not the only one. Trigger points in the SCM and spasm of the tensor tympani from trigeminal hyperactivity produce identical sensations. Differential diagnosis includes tympanometry and myofascial assessment of cervical and masticatory muscles.

MYTH

Chronic tinnitus has no treatment

FACT

Cochlear tinnitus from irreversible damage to hair cells has limited treatment to habituation and sound therapy. But somatosensory tinnitus — modulable by movements — responds very well to dry needling and medical acupuncture in the masticatory and cervical muscles. The problem is that many patients are never evaluated for this possibility.

The test that reveals the origin of tinnitus

Treatment protocol

Somatosensory assessment and exclusion
1st visit

Tinnitus modulation tests (mandibular contraction, pressure on the tragus, cervical rotation). Palpation of the masseter, pterygoids, SCM, and suboccipitals. Review of prior audiologic tests. If alert signs, priority referral to otolaryngologist.

Dry needling of the masseter and SCM
Sessions 1-3

Needling of the superficial and deep masseter with search for twitch response. Dry needling of the sternal belly of the SCM with pinching technique. Electroacupuncture 2 Hz for neuromodulation of the trigeminal pathway. Complementary auricular points when indicated.

Pterygoids and deep musculature
Sessions 4-6

Needling of the lateral pterygoids when they contribute to the picture (associated TMD). Treatment of the suboccipitals and scalenes when there is a cervicogenic component. Integration with mandibular relaxation exercises and awareness of dental clenching.

Maintenance and self-management
Sessions 7-10

Spacing of sessions to biweekly and monthly. Self-management: mandibular relaxation techniques, cervical posture, awareness of daytime bruxism. If necessary, nighttime occlusal splint as a complement to myofascial treatment.

Clinical pearl: the somatosensory triad

Frequently asked questions

FREQUENTLY ASKED QUESTIONS · 03

Frequently Asked Questions

If the otolaryngologist confirmed that auditory function and the tympanic membrane are normal, this in fact reinforces the somatosensory hypothesis. The next step is a myofascial assessment with a medical acupuncturist to verify whether masticatory and cervical muscles are contributing to the tinnitus and the sensation of plugged ear.

The masseter is a thick and well-vascularized muscle. Insertion of the needle generates a sensation of pressure, and the twitch response can cause a brief contraction of the jaw. The discomfort is momentary and generally much less than the chronic pain the patient already faces. Needles used are fine (0.25 mm) and the procedure is rapid.

In cases of predominantly somatosensory tinnitus, significant reduction — and in some patients resolution — has been described in clinical series. In cases with mixed component (cochlear + somatosensory), myofascial treatment tends to reduce the intensity of tinnitus, but may not eliminate it completely. The response is individual and depends on the predominant etiology, chronicity, and perpetuating factors; the initial assessment guides the prognosis.