Tensor Tympani Syndrome (TTS)

Middle ear muscles

We have two muscles attached to the tiny ossicles (bones) in the middle ear:

the stapedius muscle (attached to the stapes or stirrup bone)
the tensor tympani muscle (attached to the malleus bone).

The stapedius muscle contracts in response to loud sounds, providing protection to the inner ear from these potentially damaging sounds by stiffening the ossicles and limiting transmission of sounds to the inner ear.

The tensor tympani (TT) muscle attaches to the tensor veli palatini (TVP) muscle, which is in turn influenced by muscular tension in the TMJ (jaw joint) region. The TT and TVP muscles are innervated by a motor branch of the trigeminal nerve.

Tensor Tympani (TT) muscle contraction

The TT muscle is activated by:

self-generated auditory stimuli: swallowing, chewing, vocalization
non-auditory stimuli: startle reflex, anticipation of loud sounds, jet of air onto the eye, tactile stimulation of the face (Edmonson et al 2022).

Contraction of the TT muscle pulls on the eardrum and stiffens the ossicles (Edmonson et al 2022). The TT muscle can develop an intermittent or chronic myoclonus (rhythmic hyperactivity, spasm) known as tensor tympani syndrome (TTS), first identified by ENT specialist Ingmar Klockhoff and originally known as tonic tensor tympani syndrome or (TTTS).

TT muscle contraction has a variable threshold, which can be reprogrammed downwards, and has an established link with stress:

activated as part of the startle response, exaggerated with high stress levels
established protective function: contracts in anticipation of loud sounds and immediately before self-vocalisation
"is influenced by the higher level centers of the brain and by the autonomic nervous system and as such is affected by stress, anxiety, and panic. Sounds perceived as unpleasant or dangerous are particularly strong activators." (Jastreboff, Textbook of Tinnitus, 2024)
TTS is “a psychosomatic syndrome due to increased psychic tension caused by mental stress” (Klockhoff, 1978)

What are the effects of TTS?

This heightened contraction of the TT muscle:

tightens the eardrum
affects the opening of the Eustachian tube, which ventilates the middle ear cavity, and is normally closed but opens when we yawn or swallow
can cause inflammation of the trigeminal nerve innervating the TT muscle.

As a result, TTS can lead to a range of symptoms, which can include:

in the ear:
- tinnitus, often rhythmic eg clicking, thumping etc or a low frequency rumbling, buzzing sound (Wickens et al 2017, Pollack et al 2014, Ellenstein et al 2013)
- fullness/blockage, pain, frequent “popping”, eardrum flutter, vibration, muffled hearing, distorted hearing, mild vertigo/dizziness (Sutton et all 2025, Wickens et al 2017, Bance et al 2013, Riga et al 2010, Westcott 2006, Milhinch 2001)
pain:
- dull earache due to eardrum retraction
- irritation/inflammation of the trigeminal nerve leads to neuropathic stabbing pain, and numbness or burning sensations in and around the ear, which can radiate to the cheek, side of neck and TMJ region (Ramirez et al 2008, Westcott 2010, Noreña et al 2018).

TTS:
my background

Acoustic shock was first documented in 2000. The immediate cause of acoustic shock symptoms is considered to be excessive contractions of both middle ear muscles from exposure to the triggering acoustic incident (Patuzzi, Milhinch and Doyle, 2000, Patuzzi, 2002). Any ongoing symptoms of acoustic shock are consistent with TTS (Milhinch 2001, Patuzzi 2002, Westcott 2006, Londero et al 2017, Noreña et al 2018).

After working intensively with acoustic shock patients from 2002, I realised that acoustic shock symptoms persist, becoming an acoustic shock disorder, if hyperacusis develops from the acoustic shock (Westcott 2010).

Pain is not the only sound-induced physical aural symptom experienced by by hyperacusis patients. Hyperacusis, acoustic shock and tinnitus patients can experience a range of sound-induced symptoms.

Since 2002, I have observed and diagnosed symptoms consistent with TTS in many tinnitus patients and almost all hyperacusis patients, and documented that their symptoms can be triggered by loud/sudden/intolerable sounds (Westcott 2009, 2010, 2015). These findings were replicated in a multi-clinic study of 345 patients showing: ≥1 symptoms in 68% of severe tinnitus patients; ≥1 symptoms in 91.3% of severe hyperacusis patients; and confirming that symptoms could be sound induced/aggravated (Westcott et al 2013).

TTS has now been objectively verified as present when sound-induced symptoms of aural discomfort/pain are reported by hyperacusis and acoustic shock patients (Fournier et al 2022).

What triggers TTS?

After careful observation in hundreds of patients, I have found that TTS can develop as an involuntary, central, nociceptive, ‘protective’ response in an ear considered to be highly vulnerable, in a process similar to central pain sensitisation. This can become triggered in response to sounds (and other stimuli) subconsciously perceived as potentially harmful to the ear/hearing/tinnitus (Westcott 2009, 2015, Westcott et al 2013).

Once this pathway has become established, clinical observation shows the symptoms themselves can trigger an ongoing nociceptive ‘loop’ i.e. sounds subconsciously perceived as potentially causing pain (or other TTS symptoms) can trigger ongoing TTS.

In an alternative pathway, TT muscle contraction is considered to be primarily responsible for aural symptoms, including tinnitus, secondary to TMJ dysfunction (Ramirez et al 2007, 2008). Stress-related jaw clenching and muscular tightness in the TMJ region can produce TTS.

Both these TTS triggering pathways may be active. When TTS is solely a secondary consequence of muscular stress or TMJ dysfunction, the symptoms are not directly triggered by stimuli perceived as potentially threatening to the ears/hearing/tinnitus. With TTS associated with tinnitus/hyperacusis, the primary cause is related to the way these sounds are perceived in the brain.

TTS diagnosis

TTS provides the only logical explanation that is consistent with both clinical and lived experience of the range of sound-induced aural symptoms in hyperacusis, acoustic shock and tinnitus patients.

Milder TTS symptoms can develop in anyone with stress-related muscular tightness in the jaw, or who considers their ear or hearing are vulnerable.

TTS symptoms are subjective, so symptoms consistent with TTS are not widely recognised, understood or diagnosed in the medical profession.

Diagnosis can be made on the basis of history taking by analysing the onset of symptoms, symptom triggers and the pattern of symptom escalation over time - after middle or inner ear pathology as an alternative cause for these symptoms has been investigated and cleared. Normal tympanometry results as part of an audiology assessment can be highly reassuring.

An understanding of TTS and TTS triggers explains why:

tinnitus patients frequently report their ears “feel different”; aural blockage consistent with TTS is common
hyperacusis patients can have a delay in sound-induced symptoms or a cumulative build up of symptoms over the day
patients with severe hyperacusis are in frequent/constant pain, exacerbated by intolerable sound exposure, consistent with trigeminal nerve inflammation
tinnitus and hyperacusis can be variable (“good” days, “bad” days) and can be the basis of reactivity/spikes.

TTS: clinical observations

TTS myoclonus is involuntary, although some people are able to voluntarily contract their TT muscle

symptoms consistent with TTS show a spectrum of severity, ranging from mild to severe
some or all symptoms may be present
TTS is NOT the result of damage to the ear/hearing. Even though TTS symptoms can seem as if the ear is being significantly affected or even damaged by sounds, this is not the case.
TTS does NOT cause damage to the ear/hearing nor inflammation of the middle ear structures
TTS can cause inflammation of the trigeminal nerve
TTS can affect one side only or more strongly, leading to asymmetric or unilateral symptoms
misophonia patients do not develop sound-induced TTS symptoms.

Refocusing strategies

Once TTS has been diagnosed, as the symptoms are not reflective of harm, there is no medical reason why the symptoms and triggers need to be monitored. Overly anticipating and monitoring the symptoms will reinforce the brain’s need to ‘protect’ the ears, helping to perpetuate the TTS cycle. Additionally, over-monitoring will keep the symptoms prominent and enhance awareness of them.

If possible, and if the symptoms are not severe, the best way to deal with TTS symptoms is to train the brain to view them as unimportant – by briefly acknowledging them when they are noticed and using refocussing strategies to reduce symptom awareness.

A TTS consultation with a multidisciplinary treatment approach is available from Dr Philippa James at DWM Audiology.

Testimonials

How can TTS be treated?

A personalised understanding of TTS, management of TTS triggers, targeted and effective TTS treatment, stress management, and a patient-centred tinnitus habituation/hyperacusis desensitisation process will reduce TTS symptoms.

Tracking TTS symptoms can be a non-invasive clinical indication of the efficacy of treatment.

Medical treatment

Pain

Effective pain treatment is a priority for hyperacusis patients experiencing TTS-related pain. Severe sound-induced neuropathic pain is consistent with trigeminal nerve inflammation. Consulting a Pain Physician is recommended for assessment and treatment of TTS-related trigeminal neuralgia.

ENT specialist Dr Michael Boedts has developed a unique and effective treatment approach:

https://hyperacusiscentral.org/boedts-interview/

https://luisterkliniek.be/

Remedial Massage/Musculo-skeletal Physiotherapy

Palatal aponeurosis massage (C Coelho et al, 2022).

Physiotherapy can provide neural desensitisation strategies including relaxation of the facial muscles in and around the ear, identification and massage of muscular trigger points.

A skilled and unique program of TTS neural desensitisation, incorporating neural tapping and myotherapy, has been developed at: https://www.melbournespinalsportsmedicine.com.au/programme-for-management-of-tinnitus-and-hyperacusis/

Also helpful:

Exercises/massage to relax the facial muscles in and around the ear and jaw
Guidance in locating muscle trigger points in the neck, shoulder and arm. Gentle self-massage of those trigger points can be of benefit.