Ear pain is the number one reason divers abort a dive — and the leading cause of preventable barotrauma. At just 10 metres, the pressure surrounding you has already doubled compared to the surface. If you have ever felt a stabbing pain during descent and pushed through it anyway, you may have already damaged your eardrum without knowing it. The good news: ear equalization is a learnable skill, and the right technique turns a potentially dive-ending problem into a non-event.
Why Ears Hurt Underwater
The middle ear is an air-filled cavity sealed on one side by the eardrum. As you descend, water pressure increases and pushes the eardrum inward. The only way to relieve that force is to let air into the middle ear through the Eustachian tube — a narrow channel connecting your middle ear to the back of your throat.
The problem is that many people have narrow, swollen, or congested Eustachian tubes due to allergies, a cold, smoking, or simple anatomy. When the tube can't open, pressure builds against the eardrum. At first it feels like fullness or muffled hearing. At a few metres more, it becomes sharp pain. Keep descending and you risk a ruptured eardrum or inner ear barotrauma — injuries that can take weeks or months to heal and may permanently affect your hearing or balance.
Pressure vs. Depth
1 ATM
0 m — surface baseline
2 ATM
10 m — pressure doubled
3 ATM
20 m — pressure tripled
The steepest pressure change per metre happens in the shallowest water. The difference between the surface and 10 metres is the same as the difference between 10 and 30 metres. This is why most ear injuries happen in the first few metres of a dive — divers descend too fast before the ears have a chance to equalize.
4 Equalization Techniques
There is no single "correct" technique. Different methods work for different people, and experienced divers often combine them. Learn all four and practise them at the surface before your next dive.
Valsalva Maneuver — Pinch and Blow
Pinch your nose through your mask and blow gently against closed nostrils. You should feel air moving into your ears — a soft "click" is normal. This is the technique taught in most open-water courses and the one most beginners use. The critical word is gently. Blowing too hard can spike pressure suddenly and rupture small blood vessels in the round window of the inner ear — a serious injury. If it doesn't work with light pressure, stop and try a different method.
Toynbee Maneuver — Pinch and Swallow
Pinch your nose and swallow at the same time. Swallowing contracts the muscles around the Eustachian tube and actively pulls it open, while the pinch prevents air escaping through the nose. This technique works especially well during ascent or when the Valsalva produces no result. Many divers find it more reliable than Valsalva for "stubborn" ears.
Frenzel Maneuver — Tongue to Palate
Pinch your nose, close your glottis (as if about to lift something heavy), then push the back of your tongue upward toward the roof of your mouth while making a "K" or "ng" sound. This compresses the air in the back of the throat and directs it toward the Eustachian tube without involving the lungs at all. It is the preferred method for freedivers and technically skilled scuba divers because it cannot over-pressurize the inner ear. It takes practice to learn but is the gentlest, most controllable equalization method available.
Jaw Wiggle / Swallowing — Passive Pre-equalization
Move your jaw from side to side, yawn (while pinching the nose), or simply swallow. These passive movements tug gently on the tissues surrounding the Eustachian tube and can nudge it open without any pressure. This method works well as a preventive measure at the surface and in the first metre or two of descent before any discomfort sets in. It is rarely enough on its own below 3 metres but is an excellent habit to build before every descent.
The Golden Rule: Equalize Early and Often
The single biggest mistake beginners make is waiting until they feel pain before equalizing. By the time pain arrives, the eardrum is already stressed and the Eustachian tube may be locked shut by the pressure differential — making equalization much harder. Follow this protocol on every dive:
Before you submerge: Equalize at the surface. Do a Valsalva or jaw wiggle while your face is still above water. Start the dive with both ears already balanced.
Every 1–2 metres: Equalize continuously during descent — not every 5 metres, not when you remember. Some instructors say "equalize before you need to." That is the right instinct.
Pain means stop: The moment you feel any discomfort, stop descending immediately. Ascend 1 metre, equalize until the pressure releases, then descend very slowly — no faster than 9 metres per minute. If you cannot equalize after two or three attempts, abort the dive. No dive site is worth a ruptured eardrum.
A "click" is fine; a "pop" with pain is not: A soft click when air moves into the ear is completely normal. A loud pop accompanied by sudden pain, dizziness, or muffled hearing is a warning sign of barotrauma. Surface immediately.
Descend head-down when possible: The Eustachian tube opens more naturally when your head is angled down. Feet-first descents are common but can make equalization harder for many people.
What NOT To Do
Reverse Squeeze on Ascent
Most divers are familiar with squeeze during descent, but pressure can also trap air during ascent — called a reverse squeeze or reverse block. As you ascend, the air in your middle ear expands. If the Eustachian tube is partially blocked (from congestion or rebound from a decongestant spray), that expanding air can't escape fast enough, causing pressure and pain on the way up.
Reverse squeeze usually resolves on its own within 30 minutes after surfacing as the tissues relax. If it doesn't, or if it's accompanied by dizziness or hearing loss, see a doctor the same day. Do not dive again until cleared by a physician — the anatomy may be more inflamed than it feels from the outside.
Barotrauma Severity Scale
Severity scale
If you experience bleeding from the ear canal, sudden significant hearing loss, or severe vertigo after a dive, treat it as a medical emergency. These signs indicate either a ruptured eardrum or inner ear barotrauma — a condition where fluid or air has entered the inner ear. Do not dive again. See an ENT specialist (ear, nose, and throat doctor) as soon as possible. Delayed treatment significantly worsens outcomes.
What Good Dive Centers Do Differently
Quality dive centers brief beginners thoroughly on equalization technique before they even enter the water — not just a one-sentence mention. Good instructors demonstrate each technique, ask students to practise at the surface, and stop the descent at 2–3 metres to check that every diver is clear. They create a culture where saying "my ears won't clear" is met with patience, not pressure.
Low-quality operations rush descents to keep the group moving. Barotrauma incidents are significantly more common at centres where guides prioritise schedule over safety. A diver who feels pressure to "just push through it" is a diver who ends up in an ENT clinic instead of on the reef.
Before booking your first dive — or your hundredth — check your dive center's Safety score on ScubaProof. We aggregate real data on equalization briefings, descent rates, and incident culture so you can dive with confidence that the operation puts your ears (and your hearing) first.