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Eustachian Tube Dysfunction

Original Editor - Ewa Jaraczewska based on the course by Micaela Weinberg

Top Contributors - Ewa Jaraczewska and Jess Bell  

Introduction

The Eustachian tube is a small structure measuring approximately 35-45 mm in length and 2-3 mm in diameter.[1] Dysfunction of the Eustachian tube can cause persistent symptoms that affect quality of life, including a sensation of blocked ears, feeling underwater, grogginess, balance disturbances, tinnitus, and headaches. The Eustachian tube and the temporomandibular joint (TMJ) are closely linked anatomically. This article explores the relationship between these structures and how physiotherapists can be involved in managing Eustachian tube dysfunction.

Anatomy of the Eustachian Tube

The Eustachian tube extends from the middle ear to the nasopharynx.[2] It has two parts: a superior and inferior portion, each with different properties and functions.[1]

The superior portion, or the bony part, is located within the petrous section of the temporal bone. It is rigid, connects directly to the middle ear cavity, and remains constantly open (patent).

The inferior portion consists of fibrocartilage and makes up approximately two-thirds of the total tube length. It remains closed at rest and opens only during specific movements.

The permanently open bony portion provides a stable connection to the middle ear. At the same time, the dynamic cartilaginous segment functions as a valve, opening and closing in response to pressure changes and drainage requirements.[3]

[4]

Muscular Control

The four muscles of the Eustachian tube are tensor veli palatini, levator veli palatini, salpingopharyngeus and tensor tympani.

Tensor veli palatini originates between the medial and lateral pterygoid plates and inserts onto the palatine aponeurosis (PA)—a fibrous sheet within the soft palate that attaches to the posterior border of the hard palate and serves as an anchor point for several muscles involved in Eustachian tube function.[5] Tensor veli palatini's primary actions are tensing the soft palate and opening the Eustachian tube.[1] It receives innervation from the mandibular branch of the trigeminal nerve, which also supplies the muscles of mastication. This shared innervation may provide a neurophysiological link between TMJ function and Eustachian tube control.[3] For example, pain in the TMJ or muscles of mastication can trigger a trigeminal nerve feedback loop that shifts neural activity away from stabilisation and toward muscles requiring precise coordination and timing, such as tensor veli palatini. This altered neural activity may disrupt tensor veli palatini function, causing delayed or poorly coordinated contraction, which could affect Eustachian tube opening.[3]

Levator veli palatini supports the action of tensor veli palatini by elevating the soft palate during Eustachian tube opening.[1] It originates from the petrous part of the temporal bone and the cartilaginous part of the Eustachian tube and inserts onto the palatine aponeurosis. Its innervation comes from the vagus nerve. Manual therapy techniques may influence its function through fascial connections, as both levator veli palatini and tensor veli palatini insert onto the palatine aponeurosis within the soft palate, which is directly palpable.[3]

Musculus uvulae, palatopharyngeus, and palatoglossus form part of the soft palate along with the tensor veli palatini and levator veli palatini. Although not classified as Eustachian tube muscles, dysfunction in these structures may affect the entire soft palate complex and impact tube function.

Tensor tympani stiffens the tympanic membrane, which may indirectly influence Eustachian tube function. It shares the same innervation as the tensor veli palatini through the mandibular branch of the trigeminal nerve, reinforcing the neurological connections between jaw function and middle ear mechanics.

Salpingopharyngeus, which is located in the cartilaginous portion of the Eustachian tube, is innervated by the vagus nerve via the pharyngeal plexus.

Physiology and Pathophysiology of the Eustachian Tube

Eustachian Tube Functions

The Eustachian tube's primary functions are pressure equalisation between the middle ear and atmosphere and secretion drainage from the middle ear to the nasopharynx.[6][7]

Pressure Equalisation

The Eustachian tube equalises pressure between the external atmosphere and the middle ear cavity.[1] This is an important function as it allows normal movement and vibration of the tympanic membrane and ossicles of the middle ear, creating normal transmission of sound. The tube equalises pressure by briefly opening to allow air to move in or out of the middle ear, then closing again. Air movement into or out of the middle ear depends on the pressure in the middle ear relative to atmospheric pressure, with airflow following normal pressure gradients.  This cycle occurs several times per minute during activities such as chewing, yawning, and swallowing, and Valsalva manoeuvres can also trigger it.[3] When pressure differences develop, the tympanic membrane either retracts inward or bulges outward, affecting sound transmission. This can create the uncomfortable sensations patients describe as fullness or blockage and cause changes in hearing. [3]

Secretion Drainage

The internal lining of the Eustachian tube contains specialised cilia, microscopic hair-like structures that facilitate the movement of mucus from the middle ear toward the nasopharynx.[8] Goblet cells within the lining produce mucus that traps particles that might otherwise enter the middle ear, providing a protective barrier against infection.[9]

Clinical relevance: The anatomy of the Eustachian tube changes with age. This explains why children are more susceptible to ear infections. In young children, the Eustachian tube is more horizontal and narrower, making gravitational drainage of secretions more difficult. As the child matures, the tube becomes more angulated and wider. This improves natural drainage and reduces the risk of infection.[10]

Eustachian Tube Dysfunction

Eustachian tube dysfunction is generally classified as either patulous or obstructive (also called dilatory).[2][7]

Patulous Dysfunction

Patulous dysfunction occurs when the tube remains open (patent), rather than closing at rest.[11] The hallmark symptom is autophony—hearing one's own voice or breathing as unusually loud or echoing. Patients may also report hearing their own heartbeat (pulsatile tinnitus), a sensation of aural fullness or blockage, or fluctuating or positional symptoms.[11] The primary cause of dysfunction is significant weight loss, as this affects the fat pad responsible for the passive closing of the tube. Hormonal changes and dehydration can also contribute to this condition.

[12]

Obstructive Dysfunction

Obstructive dysfunction is the most common type of Eustachian tube dysfunction. It occurs when the Eustachian tube fails to open sufficiently or remains closed when it should open. It typically follows upper respiratory infections, sinusitis, or allergic reactions.[7] The increased mucus production and inflammation associated with these conditions narrow the tube's internal diameter, causing functional obstruction. Common symptoms include aural fullness, a 'popping' sensation, discomfort, pressure, crackling or ringing (tinnitus), ear pain (otalgia), and reduced hearing.[13]

In most cases, symptoms resolve as the acute illness subsides and inflammation decreases. However, if symptoms persist, the dysfunction may become chronic, with the muscles responsible for opening the tube failing to generate adequate contraction strength or coordination.[7] This is known as neuromuscular dysfunction of the Eustachian tube, and it may result from insufficient tensor veli palatini contraction or impaired timing and coordination.

Related Conditions

"Airplane Ear" Phenomenon

Early Eustachian tube dysfunction may become problematic only in situations that challenge the system, such as air travel. Patients may report minimal or no symptoms during daily activities but experience significant pain and pressure during flights. This "airplane ear" phenomenon can be an early warning sign that the muscular system cannot meet the demands of pressure equalisation.[14]

Tonic Tensor Tympani Syndrome

The tensor tympani muscle extends from the malleus to the cartilaginous part of the Eustachian tube. Its function is to tense the tympanic membrane, dampening loud sounds.[3] Tonic tensor tympani syndrome (TTTS) involves the involuntary and repetitive contraction of the tensor tympani. TTTS may be triggered by sounds or somatosensory inputs such as bruxism, anxiety, swallowing, yawning, or talking. Symptoms include a blocked ear and rhythmic fluttering or clicking in the ear, especially during swallowing, yawning, or talking.[3]

One theory links TTTS with ear fullness in patients with temporomandibular arthritis. This connection is attributed to their shared embryological origin and trigeminal nerve innervation.[15]

Physiotherapy management of TTTS involves influencing the tensor tympani muscle via changes in the mandibular branch of the trigeminal nerve, rather than direct palpation, because the tensor tympani is located in the canal superior to the bony portion of the Eustachian tube. [3]

Hamular Bursitis

Hamular bursitis is a condition that physiotherapists should recognise, as it may mimic temporomandibular disorders.[16]

The pterygoid hamulus is located on the medial plate of the pterygoid process of the sphenoid bone.[17] The tensor veli palatini wraps around the hamulus. Overuse of this muscle, such as from prolonged singing, gum chewing, or excessive swallowing, can inflame the bursa surrounding the pterygoid hamulus.[3] Patients with hamular bursitis present with localised palatal pain that may refer to the throat, ear, or hard palate, as well as maxillary pain and dysphagia. On examination, the affected hamulus may appear more prominent than the contralateral side, with localised erythema.[16]

TMJ and Eustachian Tube Connection

The TMJ and Eustachian tube are connected through several anatomical and functional pathways.[3]

Proximity: the TMJ sits just 1.5 cm anterior to the middle ear and directly anteromedial to the bony portion of the Eustachian tube. Inflammation, tissue thickening, or altered mechanics in the TMJ region can directly influence adjacent structures, including the tube itself.

The petrotympanic fissure is another connection: it is a bony line that separates the middle ear from the TMJ, and inflammation of the TMJ can spread to adjacent anatomical structures.

Ligamentous connections: the discomalleolar and anterior malleolar ligaments create direct physical links between the TMJ disc and the malleus bone of the middle ear. Dysfunction in TMJ mechanics may therefore transmit abnormal forces through these ligaments, affecting middle ear function.

Shared innervation: the trigeminal nerve supplies the muscles of mastication, the tensor veli palatini, the tensor tympani, and provides sensory innervation to the tympanic membrane. Optimising nerve function by treating the TMJ and associated structures can simultaneously improve signalling to all these targets.

As previously mentioned, pain in the structures innervated by the mandibular branch of the trigeminal nerve may alter innervation to small muscles that require fine control, such as the tensor veli palatini, in order to prioritise TMJ stability.[3]

Myofascial connections: tensor veli palatini originates between the medial and lateral pterygoid plates. This suggests that manual therapy to the medial pterygoid may influence the tensor veli palatini via direct fascial connections and increased local blood flow. The pterygomandibular raphe, which originates from the pterygoid hamulus, provides another link between the jaw and Eustachian tube structures. This is another structure that is directly palpable and treatable by physiotherapists and therefore influences the tendon of the tensor veli palatini.

Physiotherapy Assessment for Eustachian Tube Dysfunction

It is helpful if the patient has seen an ear, nose, and throat (ENT) specialist to ensure that allergies, reflux, or infection are not causing Eustachian tube dysfunction; however, this is not mandatory. If a patient’s symptoms do not improve within 3-5 sessions, referral to an ENT to assess the function and structure of the tube may be indicated.[3]

The physiotherapy assessment must include a standard TMJ evaluation, as well as observation and palpation of the hard palate, soft palate, and palatine aponeurosis. If the patient has a strong gag reflex, asking them to press their tongue against the examining finger can help.[3]

Observing palatal architecture can provide useful clinical information. Higher arched palates, often associated with childhood breathing difficulties, may indicate longstanding dysfunction.[18] Ask about childhood history: tonsillectomy, adenoidectomy, snoring, or breathing difficulties. Understanding this history may help explain the patient's current symptoms.

Physiotherapy Treatment for Eustachian Tube Dysfunction

Physiotherapy treatment combines standard TMJ interventions with specific palatal techniques.[3]

Manual therapy to the TMJ may be indicated if the assessment reveals contributing dysfunction, but not every patient with Eustachian tube problems requires TMJ treatment. The focus may instead be on the palatine aponeurosis, soft palate muscles, and pterygomandibular raphe using intraoral techniques. These can be performed in either the sitting or supine position, depending on patient comfort and practitioner access.

Lateral friction techniques to the soft palate often reveal increased thickness and tightness in patients with Eustachian tube dysfunction. The palatine aponeurosis responds to horizontal and vertical mobilisations. Although the hard palate lacks direct muscular attachments, mobilising its myofascial covering may be beneficial given the interconnected nature of the fascial system.

Resources

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Anatomy and Clinical Significance of the Eustachian Tube, chapter VII:105-121 In: Overview of Head & Neck Clinical Anatomy. COŞAR¹ ZS, ÇİÇEKCİBAŞI AE (editors). Livre de Lyon, 2025.
  2. ↑ 2.0 2.1 Smith ME, Scoffings DJ, Tysome JR. Imaging of the Eustachian tube and its function: a systematic review. Neuroradiology. 2016 Jun;58(6):543-56.
  3. ↑ 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 3.10 3.11 3.12 3.13 3.14 Weinberg M. Eustachian Tube Dysfunction Course. Physiopedia Plus, 2026.
  4. ↑ Keith Forwith PhD, MD. Eustachian Tube explained. Available from: https://www.youtube.com/watch?9R7sFf0KAy4 [last accessed 30/01/2026]
  5. ↑ Iwanaga J, Kido J, Lipski M, Tomaszewska IM, Tomaszewski KA, Walocha JA, Oskouian RJ, Tubbs RS. Anatomical study of the palatine aponeurosis: application to the posterior palatal seal of the complete maxillary denture. Surg Radiol Anat. 2018 Feb;40(2):179-183.
  6. ↑ Udagatti VD, Kumar RD. Eustachian Tube: Its Functions and Dysfunctions in Relation to the Pathogenesis of Middle Ear. The Journal of Medical Sciences. 2025 Aug 1;11(1--4):310-3.
  7. ↑ 7.0 7.1 7.2 7.3 Schilder AG, Bhutta MF, Butler CC, Holy C, Levine LH, Kvaerner KJ, Norman G, Pennings RJ, Poe D, Silvola JT, Sudhoff H. Eustachian tube dysfunction: consensus statement on definition, types, clinical presentation and diagnosis. Clinical Otolaryngology. 2015 Sep 7;40(5):407.
  8. ↑ Massa HM, Lim DJ, Kurono Y, Cripps AW. Middle Ear and Eustachian Tube Mucosal Immunology. Mucosal Immunology. 2015:1923–42.
  9. ↑ Ohashi Y, Nakai Y, Kihara S, Maruoka K, Ikeoka H, Uemura Y. The ciliary activity of the middle ear lining--functional and morphological observation. Auris Nasus Larynx. 1985;12 Suppl 1:S123-5.
  10. ↑ Spinato G, Martini A. From catheterization to crenotherapy: historical and functional perspective on the Eustachian tube. European Journal of Translational Myology. 2025 Sep 26;35(4):14300.
  11. ↑ 11.0 11.1 Bance M, Tysome JR, Smith ME. Patulous Eustachian tube (PET), a practical overview. World J Otorhinolaryngol Head Neck Surg. 2019 Oct 11;5(3):137-142.
  12. ↑ ENT Doctor - Lexington, SC. Patulous Eustachian Tube. Available from: https://www.youtube.com/watch?SfA0_pnojxI [last accessed 30/01/2026]
  13. ↑ Oehlandt H. Obstructive Eustachian Tube Dysfunction [Internet]. ANNALES UNIVERSITATIS TURKUENSIS TOM. 1754, MEDICA – ODONTOLOGICA 2023
  14. ↑ McHugh N, Lyons RE, Keogh I, Flaherty GT. Ear, nose and throat disorders and international travel. Tropical Diseases, Travel Medicine and Vaccines. 2025 Feb 15;11(1):3.
  15. ↑ Zong S, Yu W, Yu X, Li T, Tang W, Liu T, Xiao H. The advancements in understanding the pathogenesis of ear fullness. J Otol. 2025 Apr 30;20(2):72-81.
  16. ↑ 16.0 16.1 Shetty SS, Shetty P, Shah PK, Nambiar J, Agarwal N. Pterygoid hamular bursitis: a possible link to craniofacial pain. Case reports in surgery. 2018;2018(1):5108920.
  17. ↑ Barchetta NF, de Oliveira RL, Silveira VÁ, Faig-Leite H. Clinical and morphofunctional aspects of pterygoid hamulus: literature review. Brazilian Dental Science. 2015 Dec 7;18(4):5-11.
  18. ↑ Widodo DW, Hisyam A, Alviandi W, Mansyur M. Comparison of Eustachian tube ventilation function between cleft palate and normal patients using sonotubometry. JPRAS Open. 2021 Apr 24;29:32-40.
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