Barotrauma

What Is Ear Barotrauma?

Ear barotrauma — also known as aerotitis media or barotitis media — is pressure-related damage to the ear that occurs when the air pressure in the middle ear fails to equalise with the external environmental pressure. This pressure imbalance places stress on the eardrum and middle ear structures, causing symptoms that range from mild discomfort and a feeling of blocked ears to severe pain, hearing loss, and eardrum perforation.

Barotrauma is an extremely common condition. Most people have experienced at least a mild form during a flight — that uncomfortable feeling of fullness and muffled hearing during descent. In the UK, where approximately 280 million passenger flights depart annually (Civil Aviation Authority data), flight-related ear barotrauma is one of the most frequently reported travel health complaints. The condition also affects scuba divers, people driving through mountainous terrain, and patients undergoing hyperbaric oxygen therapy. While mild barotrauma is usually harmless and self-resolving, moderate and severe cases can cause significant injury that requires medical attention, and inner ear barotrauma — particularly from diving — can result in permanent hearing damage if not treated urgently.

How Pressure Equalisation Works

Understanding why barotrauma happens requires a basic knowledge of ear anatomy and the physics of pressure. The middle ear is a small, air-filled cavity located behind the eardrum (tympanic membrane). For the eardrum to vibrate freely and transmit sound efficiently, the air pressure on both sides of it must be equal. The body achieves this balance through the Eustachian tube — a narrow passage approximately 36 mm long that connects the middle ear to the back of the throat (nasopharynx).

The Eustachian tube is normally closed at rest. It opens briefly during swallowing, yawning, and certain jaw movements, allowing air to pass between the throat and the middle ear to equalise pressure. This process works seamlessly under normal conditions — most people are unaware it is happening.

The physics behind barotrauma follows Boyle's law: at a constant temperature, the volume of a gas varies inversely with the pressure applied to it. As external pressure increases (during aircraft descent or diving deeper underwater), the air trapped in the middle ear is compressed, reducing its volume and creating negative pressure relative to the outside. This negative pressure pulls the eardrum inwards, causing pain and reduced hearing. Conversely, during ascent, the air in the middle ear expands and typically vents passively through the Eustachian tube — which is why barotrauma is much more common during descent than ascent.

When the Eustachian tube cannot open quickly enough to equalise the increasing external pressure — due to congestion, infection, inflammation, or anatomical factors — the pressure differential across the eardrum builds. If it exceeds the structural tolerance of the eardrum and middle ear tissues, injury results. The greater the pressure differential and the faster the pressure change, the more severe the potential damage.

Common Scenarios

Barotrauma can occur in any situation involving rapid pressure changes. The most common scenarios in the UK include:

Flying

Air travel is by far the most common cause of ear barotrauma. During aircraft descent, the cabin pressure rises as the plane drops in altitude, compressing the air in the middle ear. The final 30 minutes of descent typically involve the most significant pressure change, and this is when most symptoms occur. Short-haul flights with rapid descents can be particularly problematic. People with Eustachian tube dysfunction, colds, or sinus congestion are at significantly higher risk.

Scuba Diving

Diving poses a greater barotrauma risk than flying because pressure changes underwater are much more rapid and extreme. Water is approximately 800 times denser than air, so pressure increases by one atmosphere for every 10 metres of depth. A diver descending just 5 metres below the surface experiences a 50% increase in ambient pressure — a change far greater than anything encountered in an aircraft cabin. Failure to equalise the ears during descent is the most common injury in recreational diving.

Other Situations

Less common triggers include driving through mountain passes or long tunnels (where altitude changes cause pressure shifts), hyperbaric oxygen therapy (used for conditions such as carbon monoxide poisoning, non-healing wounds, and decompression sickness), high-speed lifts in tall buildings, and blast injuries from explosions. Even forceful nose-blowing during a cold can occasionally cause barotrauma by forcing air or infected mucus into the middle ear.

Classification by Severity

Ear barotrauma is classified into grades of severity based on the extent of injury to the eardrum and middle ear. Understanding this classification helps explain the range of symptoms and guides appropriate treatment.

Mild Barotrauma (Grade 1)

The eardrum is slightly retracted inwards but intact, with injection (redness) of the blood vessels along the handle of the malleus (one of the tiny middle ear bones). Symptoms include a feeling of ear fullness, mild discomfort, and slight hearing reduction. This is the most common form and is experienced by many airline passengers during descent. It typically resolves within minutes to hours once the pressure equalises.

Moderate Barotrauma (Grades 2-3)

More significant retraction of the eardrum with diffuse redness and, in grade 3, bleeding into the middle ear — a condition known as haemotympanum, visible as a blue, purple, or dark red discolouration behind the eardrum on otoscopy. Symptoms include more pronounced pain, noticeable hearing loss, tinnitus (ringing or buzzing), and a persistent feeling of blockage. Fluid may accumulate in the middle ear. Recovery typically takes one to three weeks with conservative management.

Severe Barotrauma (Grades 4-5)

The eardrum may be perforated (a tear or hole develops due to the pressure differential), or there may be significant middle ear effusion (fluid build-up). Symptoms include sudden, sharp pain (often followed by immediate pain relief if the drum perforates), hearing loss, discharge from the ear (blood-stained or clear), and potentially vertigo. In the most severe cases — particularly during diving — inner ear barotrauma can occur, involving damage to the delicate structures of the cochlea and vestibular apparatus. This can cause a perilymphatic fistula (a leak of inner ear fluid through a tear in the round or oval window membrane), which may result in permanent sensorineural hearing loss and prolonged vertigo.

Risk Factors

While anyone can experience ear barotrauma, certain factors significantly increase the risk:

• Upper respiratory infections (colds): Viral infections cause swelling of the Eustachian tube lining, reducing its ability to open and equalise pressure. Flying or diving with a cold is one of the most common causes of clinically significant barotrauma
• Allergic rhinitis and sinusitis: Chronic nasal and sinus inflammation narrows the Eustachian tube and impairs its function
• Eustachian tube dysfunction: Some people have inherently poor Eustachian tube function, making them prone to barotrauma even without congestion
• Children: Young children's Eustachian tubes are shorter, more horizontal, and less efficient at opening than those of adults, making children particularly vulnerable during flights — and less able to perform equalisation techniques on demand
• Previous ear surgery: Operations on the ear or Eustachian tube can alter the pressure regulation mechanism
• Nasal polyps or deviated septum: Structural factors that restrict airflow through the nose and nasopharynx can impair Eustachian tube function
• Active ear infection: Otitis media can cause Eustachian tube blockage and increase vulnerability to pressure-related injury

Prevention

Barotrauma is one of the most preventable ear conditions. With appropriate techniques and preparation, most people — even those with mild Eustachian tube dysfunction — can fly and enjoy water activities safely.

Prevention for Flying

• Active equalisation during descent: Swallow frequently, chew gum, or yawn during the final 30 minutes of a flight. These actions open the Eustachian tube and allow air into the middle ear
• Valsalva manoeuvre: Gently pinch the nostrils closed, close the mouth, and blow softly as if trying to breathe out through the nose. This forces air up the Eustachian tubes into the middle ear. Perform this every few minutes during descent — do not wait until pain develops, as a swollen or locked tube becomes much harder to open
• Nasal decongestant spray: If you are congested or have a history of flight-related ear problems, use a decongestant spray such as xylometazoline (Otrivine) approximately 30 to 60 minutes before the expected descent. This shrinks the nasal and Eustachian tube lining, improving tube function. NHS and aviation medicine guidelines support this practice for short-term use
• Oral decongestants: Pseudoephedrine taken one hour before descent is an alternative to nasal sprays and can be effective for people prone to barotrauma
• Otovent nasal balloon: This device — available from UK pharmacies — consists of a small balloon attached to a nasal nozzle. Inflating the balloon through one nostril while holding the other closed forces air up the Eustachian tube. It can be useful for both pre-flight preparation and in-flight equalisation
• Avoid flying with a significant cold: If you have a heavy cold or acute sinusitis, postpone your flight if at all possible. The combination of mucosal swelling and the inability to equalise pressure effectively makes clinically significant barotrauma much more likely
• Stay awake during descent: If you are asleep, you cannot perform equalisation manoeuvres. Set an alarm or ask a travel companion to wake you before the descent begins

Prevention for Diving

• Equalise early and often: Begin equalising as soon as you start your descent and continue every metre or so. The Valsalva and Frenzel manoeuvres are the most commonly used techniques. The key principle is to equalise before pressure builds — once the Eustachian tubes are compressed by increasing water pressure, they become much harder to open
• Never dive congested: Diving with a cold, blocked nose, or sinus congestion is one of the most dangerous things a recreational diver can do. Congestion prevents equalisation, and the rapid pressure changes underwater can cause severe middle ear and inner ear barotrauma within seconds
• Descend feet-first: This orientation allows the Eustachian tubes to function more efficiently
• If pain develops, stop: If you experience ear pain during descent, stop immediately, ascend slightly until the pain resolves, attempt to equalise, and only continue if equalisation is successful. Never push through ear pain during a dive

Babies and Children During Flights

Young children cannot perform the Valsalva manoeuvre, so parents need alternative strategies. Feeding a baby (breast or bottle) or offering a dummy during descent encourages the sucking and swallowing motions that open the Eustachian tubes. For older toddlers, offering a drink with a straw or small sips of water achieves a similar effect. Nasal saline drops before the flight can help keep nasal passages clear. If a child has a significant cold or glue ear, consult your GP before flying — the GP may recommend a decongestant or advise postponing the trip.

Inner Ear Barotrauma and Perilymphatic Fistula

While middle ear barotrauma is common and usually self-limiting, inner ear barotrauma is a rare but serious complication that deserves separate discussion. It occurs almost exclusively in scuba divers, though it can occasionally result from forceful Valsalva manoeuvres during flying.

Inner ear barotrauma damages the delicate membranes of the cochlea (the hearing organ) or the vestibular apparatus (the balance organ). The most feared complication is a perilymphatic fistula — a tear in the round or oval window membrane (the thin membranes separating the middle ear from the inner ear) that allows perilymph (inner ear fluid) to leak into the middle ear. This causes:

• Sudden sensorineural hearing loss — which may be permanent if not treated promptly
• Severe vertigo — often with nausea and vomiting
• Fluctuating tinnitus — which may worsen with straining, coughing, or changes in head position

Perilymphatic fistula requires urgent ENT assessment. Treatment may involve strict bed rest with head elevation to allow the fistula to heal spontaneously, or surgical repair (middle ear exploration and patching of the membrane). Delayed diagnosis significantly worsens the prognosis for hearing recovery. Any diver who experiences sudden hearing loss, vertigo, or tinnitus during or after a dive should seek emergency medical attention — do not assume it will resolve on its own.

Treatment by Severity

The treatment approach for ear barotrauma depends entirely on the severity of the injury:

Mild Barotrauma

Most mild cases resolve spontaneously once the external pressure normalises and the Eustachian tube resumes normal function. Symptoms typically clear within hours to a few days. Gentle equalisation techniques (swallowing, yawning, Valsalva) can help speed recovery. Nasal decongestant sprays may be used for a few days to reduce any residual Eustachian tube swelling. No medical intervention is usually required.

Moderate Barotrauma

Cases involving middle ear effusion (fluid behind the eardrum) or haemotympanum generally require conservative management with monitoring. Nasal decongestant sprays and oral antihistamines can help the Eustachian tube recover and facilitate drainage of middle ear fluid. Pain relief with paracetamol or ibuprofen is appropriate. Most moderate cases resolve within one to three weeks. A GP review is advisable to confirm the eardrum is intact and to monitor resolution of any effusion. A tympanometry test can objectively assess middle ear pressure and fluid status.

Severe Barotrauma

If the eardrum has perforated, keep the ear dry and avoid any further pressure changes (no flying or diving) until healing is confirmed. Most traumatic perforations heal spontaneously within two to three months. Antibiotic ear drops may be prescribed to prevent secondary infection. If a perforation fails to heal, surgical repair (myringoplasty) may be necessary. For suspected inner ear barotrauma or perilymphatic fistula, urgent ENT referral is essential — delayed treatment significantly reduces the likelihood of hearing recovery.

Recurrent Barotrauma and Eustachian Tube Investigation

Some people experience barotrauma repeatedly, even with appropriate preventive measures. Recurrent episodes suggest underlying Eustachian tube dysfunction (ETD) that warrants investigation. Your GP can refer you to an ENT specialist for assessment, which may include:

• Tympanometry: Measures middle ear pressure and eardrum compliance to identify evidence of Eustachian tube dysfunction
• Eustachian tube function tests: Specialised tests that assess how well the tube opens and closes under different pressure conditions
• Nasendoscopy: A thin flexible camera passed through the nose to examine the Eustachian tube openings and exclude structural causes of obstruction such as nasal polyps, adenoid enlargement, or (rarely) nasopharyngeal tumours
• CT imaging: In selected cases, CT scanning of the sinuses and temporal bones may be performed to assess anatomy and exclude chronic sinus disease

Treatment for recurrent ETD-related barotrauma may include long-term nasal steroid sprays, treatment of underlying allergies, autoinflation devices (such as the Otovent balloon for regular use), and in refractory cases, Eustachian tube balloon dilation — a relatively new minimally invasive procedure that is increasingly available through UK ENT departments.

When to Seek Help

Mild barotrauma after a flight — ear fullness, slight discomfort, and temporary hearing reduction that resolves within a few hours — does not usually require medical attention. However, you should see your GP if:

• Ear pain, hearing loss, or a feeling of fullness persists for more than 24 hours after a pressure change
• You notice discharge or bleeding from the ear
• Tinnitus (ringing, buzzing, or humming) develops and does not resolve
• You experience recurrent barotrauma with every flight, suggesting Eustachian tube dysfunction that needs investigation

Seek urgent medical attention (same-day GP or A&E) if you develop:

• Severe hearing loss following flying or diving
• Vertigo or dizziness following a pressure change — this may indicate inner ear involvement
• Facial weakness or numbness on one side — a rare but serious sign of extensive middle ear injury
• Severe ear pain during or after a dive that does not resolve with equalisation — this may represent inner ear barotrauma requiring emergency ENT assessment

If you have experienced barotrauma and are concerned about lasting effects on your hearing, a hearing test can assess whether your hearing has returned to normal. An audiogram provides a baseline that can be compared with future tests to monitor recovery. Many audiology clinics across the UK — including Specsavers Audiology, Boots Hearingcare, and Hidden Hearing — offer comprehensive hearing assessments. Enter your postcode in our search tool to find hearing test appointments near you.