Diving, Flying, and Ear Barotrauma: Preventing Tinnitus

Scuba divers and, to a lesser extent, airline passengers and crew share a specific tinnitus risk that has nothing to do with noise: rapid changes in ambient pressure that the middle ear can't equalize fast enough, called barotrauma.

Why pressure changes affect the ear

The middle ear is normally kept at the same pressure as the outside environment through the Eustachian tube, which briefly opens when you swallow, yawn, or actively equalize. When pressure around you changes faster than the Eustachian tube can keep up — descending in water, or during a plane's climb and descent — a pressure difference builds up across the eardrum. Mild cases cause the familiar ear-popping fullness. More significant cases can injure the eardrum, middle ear, or, in the more serious cases relevant to diving specifically, the delicate structures of the inner ear itself.

Middle ear vs. inner ear barotrauma

This distinction matters for how seriously to take the symptoms:

Middle ear barotrauma — the common version — causes ear fullness, muffled hearing, and mild discomfort, and typically resolves on its own within hours to a few days.

Inner ear barotrauma — less common, more serious, and specifically associated with diving rather than flying — happens when the pressure imbalance is severe enough to damage inner ear structures directly, sometimes tearing one of the delicate membranes (a perilymph fistula). This version is far more likely to cause tinnitus, along with vertigo, dizziness, and hearing loss, and unlike ordinary middle ear barotrauma, it's a genuine medical urgency: research on inner ear barotrauma emphasizes prompt ENT evaluation, since surgical repair of a torn membrane can reverse hearing loss if done in time, while delay can mean permanent damage.

Warning signs that need prompt evaluation, not "wait and see"

• Vertigo or a spinning sensation during or after a dive or flight
• Tinnitus that appears alongside hearing loss, rather than fullness alone
• Fluid or blood draining from the ear
• Hearing loss that's sudden, or that persists beyond a day or two
• Symptoms severe enough to make it hard to stand or swim safely

Ordinary ear fullness that resolves within a day is common and not usually a concern. The combination above — especially vertigo plus tinnitus or hearing changes — is what warrants urgent care, since it's the pattern associated with inner ear injury rather than routine pressure discomfort.

Prevention: mostly technique, and knowing when not to dive or fly

For diving:

• Equalize early and often during descent — don't wait until you feel discomfort, actively equalize every few feet
• Descend slowly, and stop or ascend slightly if you can't equalize rather than forcing it
• Never dive with nasal congestion, a cold, or uncontrolled allergies — an inability to equalize is what causes the injury, and congestion is the most common reason equalization fails
• Don't use standard earplugs while diving — trapped air behind them can't equalize and creates its own pressure injury risk

For flying:

• Swallow, yawn, or chew gum during ascent and descent to encourage the Eustachian tube to open
• A decongestant nasal spray shortly before a flight can help if you're congested — though avoid flying altogether with a significant cold or sinus infection if you can reschedule
• Specialized pressure-equalizing earplugs (different from standard hearing-protection earplugs) are marketed specifically for flying and may help some people, though good swallowing/yawning technique addresses most ordinary cases

If barotrauma-related tinnitus doesn't resolve

Tinnitus that persists after a barotrauma episode should be evaluated by an ENT, following the same general workup as any new tinnitus — a hearing test at minimum, with imaging or vestibular testing if inner ear involvement is suspected based on your symptoms. Divers with a history of inner ear barotrauma are generally advised to have a full evaluation before returning to diving, given a documented risk of repeat injury in people who've already had one episode.