Ear barotrauma in diving occurs when pressure changes during descent or ascent cannot be equalised across the eardrum, causing pain and sometimes injury. Stop the descent if equalisation is difficult; do not force it or continue through pain, as doing so can worsen the injury.
The pressure shift can turn a routine dive into a problem for the middle or outer ear, and symptoms may persist after surfacing. Understanding the warning signs, common risks and appropriate care helps divers respond safely and know when to seek medical advice.
| Symptom or situation | Recommended response |
|---|---|
| Pain or fullness lasting more than a few hours | Physician evaluation |
| Fluid or blood from the ear canal | Medical evaluation |
| Vertigo or dizziness after diving | Urgent evaluation |
| Severe vertigo with nausea after diving | Emergency medical care |
| Congestion or ear discomfort before a dive | Avoid diving |
- A few hours Persistence of ear pain or fullness after which physician evaluation is recommended
- 2 settings Common pressure-change settings named in the source material: scuba diving and air travel
- 3 symptom groups Specific escalation cues in the guidance: persistent pain or fullness, ear-canal fluid or blood, and vertigo or dizziness
What is ear barotrauma, and why can diving hurt the eardrum?
Ear barotrauma is an ear injury caused by a pressure difference between the ear’s interior and the surrounding water or air. Scuba diving and air travel are common triggers: during a dive descent, increasing water pressure can make the middle-ear pressure lower than the pressure outside the eardrum, pulling it inward.
The middle ear and eustachian tubes
The middle ear is an air-filled space, and the eustachian tubes connect it to the back of the nose and throat. These tubes must open to let pressure equalize; if they do not open normally, the pressure imbalance can strain the eardrum and cause injury.
The same pressure mechanism can occur during an aircraft’s descent, when outside pressure changes around the ear. A blocked or poorly opening eustachian tube can prevent the middle-ear air space from adjusting, whether the pressure change happens underwater or in an airplane.
How can middle-ear and inner-ear barotrauma differ?
Middle-ear barotrauma is an air-pressure injury: the air space behind the eardrum fails to equalise with the surrounding water pressure, while inner-ear involvement is a concern when symptoms include dizziness or vertigo. Middle-ear barotrauma, also called ear squeeze, can occur during a dive; the inner ear is a different structure, so vertigo after diving should not be dismissed as routine ear pressure.
Symptoms and when to seek assessment
Middle-ear barotrauma may cause pain, a blocked or full sensation, bleeding or fluid from the ear canal, and, in some cases, a ruptured eardrum. Ringing and hearing loss can accompany ear barotrauma, but dizziness or vertigo raises concern that the inner ear may also be affected.
After a dive, vertigo or dizziness warrants urgent medical assessment, rather than waiting to see whether it behaves like ordinary pressure discomfort. Seek medical evaluation if ear pain or fullness lasts more than a few hours, or if blood or fluid comes from the ear canal; severe vertigo and nausea after diving require emergency care.
When should ear symptoms after a dive be assessed?
Ear symptoms after a dive should be assessed by a physician if pain or fullness lasts more than a few hours; fluid or blood from the ear canal also calls for medical evaluation. Vertigo or dizziness after diving warrants urgent assessment because it may signal inner-ear barotrauma.
Urgent symptoms
- Persistent pain or fullness: Arrange physician evaluation when either symptom continues for more than a few hours after the dive.
- Fluid or blood: Seek medical evaluation if either is coming from the ear canal.
- Vertigo or dizziness: Get urgent medical assessment after diving; these symptoms may indicate inner-ear barotrauma.
- Severe vertigo with nausea: Seek emergency medical care.
Ear barotrauma results from a pressure difference between the ear and the surrounding water. A pressure imbalance can injure the eardrum, so discharge, persistent discomfort, or balance symptoms should not be dismissed as routine post-dive effects.
How can divers reduce pressure injury before and during descent?
Divers can reduce ear pressure injury by equalizing during descent, before pain or pronounced fullness appears, and stopping if equalization is not comfortable. As water pressure rises, the eustachian tubes must let air reach the middle ears; if pressure will not equalize, do not push farther down.
Before entering the water
Congestion can interfere with eustachian-tube opening and make equalization difficult, so postpone the dive while congested. Do not start if an ear already hurts or feels uncomfortable: that symptom is a reason to stop, not to try to overcome it by descending. These precautions address the same pressure imbalance that can injure the ear during a dive.
Pressure changes beyond diving
Recent ear symptoms can also matter when flying. Aircraft descent for landing changes the pressure around the ears, just as a diver’s descent changes ambient pressure underwater; either can create an imbalance when the eustachian tubes do not open normally. If pain or fullness persists for more than a few hours, or dizziness or vertigo occurs, seek medical evaluation rather than returning to pressure changes without advice.
What should you avoid if equalization fails or an injury is suspected?
When prevention is not enough
If ear equalization fails during a dive, stop descending rather than pushing through pain or pressure: the discomfort can signal an unresolved pressure difference that may injure the ear. Proper equalization and avoiding a dive when congested can reduce the risk, but they cannot show that an injury that has already occurred is harmless.
- Persistent pain or fullness: Do not assume it is merely a blocked ear. Seek a physician’s evaluation if pain or fullness lasts more than a few hours.
- Blood or fluid from the ear: Treat discharge as a reason for physician evaluation, not reassurance that the problem is minor.
- Vertigo or dizziness after diving: Seek urgent medical assessment because these symptoms may indicate inner-ear barotrauma. Severe vertigo with nausea after a dive calls for emergency medical care.
What symptoms and actions help distinguish a routine pressure problem from a warning sign?
After a dive, ear pain or fullness that settles is different from symptoms that persist: pain or fullness lasting more than a few hours calls for a physician’s evaluation. Blood or fluid coming from the ear canal also warrants medical evaluation.
Symptoms that need prompt attention
- Dizziness or vertigo after diving: seek urgent medical assessment, as these symptoms may signal inner-ear barotrauma.
- Severe vertigo with nausea: seek emergency medical care.
- Hearing loss or ringing: both are reported symptoms of ear barotrauma, but the supplied guidance sets no separate time threshold for seeking care based on either symptom alone.
These distinctions matter because ear barotrauma can affect the middle or inner ear. Do not treat persistent pain, ear-canal discharge, or post-dive balance symptoms as equivalent to brief fullness that resolves.
FAQ
How long should ear fullness last after a dive?
Is dizziness after diving an emergency?
Can a blocked eustachian tube injure the eardrum?
Should I dive if I am congested or my ears already hurt?
What this piece draws on
- cedars-sinai.org — “Ear Barotrauma”
- pros-blog.padi.com — “Preventing and Managing Middle-Ear Barotrauma – PADI Pros”
- dan.org — “Middle-Ear Barotrauma (MEBT) – Divers Alert Network”
- health.harvard.edu — “Barotrauma – Harvard Health”
- MedlinePlus — “Barotrauma | Decompression Sickness”
