Blow through your nose to equalize and prevent mask squeeze while descending

What technique can prevent a mask squeeze while diving?

• A. Clearing the mask with water
• B. Blowing through your nose to equalize
• C. Using a larger mask size
• D. Reducing the air pressure in the mask

Answer: (B)

Blowing through your nose to equalize is the correct technique to prevent a mask squeeze while diving. This technique works because as a diver descends, the pressure around them increases, which can cause a difference between the pressure inside the mask and the surrounding water pressure. A mask squeeze occurs when the pressure inside the mask is lower than the external pressure, leading to discomfort or potential injury. By blowing gently through your nose while pinching it shut, you increase the air pressure inside the mask to match the surrounding water pressure. This equalization helps maintain comfort and prevents the mask from being sucked tightly against your face, thereby mitigating the risk of a mask squeeze. Using a larger mask size may not adequately address the underlying cause of pressure differences, as the pressure can still become unbalanced regardless of the mask size. Clearing the mask with water can serve to remove water that gets inside the mask but will not prevent the pressure differences that lead to a squeeze. Reducing the air pressure in the mask is actually contrary to what is needed, as it would exacerbate the issue instead of alleviating it.

Outline (quick skeleton)

• Intro: Why a mask squeeze happens and why the right equalization matters for Open Water training

• What a mask squeeze is: the physics of pressure as you descend

• The key technique: blowing through your nose to equalize

• Why this beats the other options

• Practical tips to get it right on every descent

• Common mistakes and how to fix them

• Safety notes: when to seek help

• Wrap-up: a reliable routine you can trust

Mask squeeze: the little pressure puzzle that can turn a dream into a headache

Let’s start with a simple scene many divers know all too well. You’re neutral, you’re calm, and then—ouch—the mask tightens against your face. It’s not that you forgot to equalize; it’s that the pressure outside your mask is rising faster than the air inside the mask can keep up. That difference is what we call a mask squeeze. It’s annoying at best and painful at worst, and it can throw off your rhythm just when you’re trying to enjoy a clean line, a gentle swim, and clear vision through your mask.

So what’s the trick to keep that squeeze from ruining your underwater vibe? There’s a classic move that pros rely on: blowing gently through your nose to equalize the mask. Here’s the thing—this isn’t about prying your mask with force or fiddling with the mask strap. It’s a controlled, small adjustment that helps the air inside your mask match the surrounding water pressure as you descend.

The technique in simple terms: blow through your nose while pinching it shut

Think of your mask like a tiny air pocket pressed against your face. When you descend, the water pressure outside pushes harder on that pocket. If the air inside the mask can’t rise to meet that pressure, the mask will press inward, and you’ll feel that squeeze. The time-tested way to prevent it is to “pop” the air inside the mask by blowing through your nose.

How to do it without turning it into a big production:

• Pinch your nose gently with your fingers.

• Keeping the mouth closed, exhale just enough to push air pressure up inside the mask.

• You don’t need a loud blast—just a steady, gentle puff.

• If the mask is clear and snug, you’ll feel the lens press outward slightly as the pressure equalizes.

• Continue your descent, repeating as needed, especially at the depth where you notice the squeeze beginning.

This works because the pressure inside the mask rises to match the external water pressure. The air you’re forcing in does not escape into the water; it stays trapped in the mask, acting like a tiny resupply pocket so the mask stays pressed against your face rather than sucked inward.

Why the other options don’t solve the problem

Let me explain why the other choices aren’t the fix for a mask squeeze:

• Clearing the mask with water (A): This is handy when water gets inside the mask and you want to clear it so you can see. It doesn’t address the pressure difference responsible for a squeeze. Water might fill the mask temporarily, but if the outside pressure keeps rising, the squeeze can return.

• Blowing through your nose to equalize (B): This is the reliable, correct method. It actively balances the pressure inside the mask with the water pressure outside.

• Using a larger mask size (C): A bigger mask might feel more comfortable at the surface, but as you descend, the pressure changes will still affect the air inside the mask. Size alone doesn’t correct the pressure differential.

• Reducing the air pressure in the mask (D): That would actually make things worse. Lowering the air pressure inside the mask creates a bigger gap with the surrounding water pressure, increasing the squeeze risk rather than reducing it.

If you want to keep things simple on the day, remember this: the only technique that prevents a mask squeeze as you go deeper is equalizing by blowing through your nose while you’re pinching it closed.

Practical tips to make this second nature

Like any good skill, it’s easier if you practice a little before you need it. Here are some practical tips that can help you make this equalization routine feel almost automatic.

• Start with a secure, comfortable mask fit: A mask that seals well on your face reduces the amount of air you need to keep the lens clear. If the mask leaks or is too loose, you’ll chase air in odd ways, which makes equalization harder.

• Practice on land first: Put the mask on dry, pinch your nose, and try the gentle nasal blow while looking in a mirror. Feel the slight increase in pressure against the mask. That awareness pays off when you’re in the water.

• Use a slow, steady breath to begin descent: When you start your descent, you may feel a little pressure. Don’t wait until the squeeze hits—begin your gentle nasal blow as you descend past the shallow depth where you first notice a difference.

• Don’t hold your breath for long: A quick exhale through the nose is all you need. If you hold your breath, you risk other pressure-related issues, like equalizing-ear pressure. Keep it relaxed.

• Think rhythm, not force: It’s not about a loud “pop”; it’s about a steady equalization rhythm. If you’re adjusting frequently, it might be a sign you’re descending too fast for your current mask fit or that your mouth and jaw tension is interfering.

• Check the mask together with the rest of your setup: Strap position, skirt contour, and even the angle of your face can affect how easy it is to equalize. A well-fitting mask plus a calm, practiced method makes the nose blow technique far more reliable.

• Remember your other checks: Equalizing the mask is just one part of overall safety. Always monitor your buoyancy, stay within your training limits, and communicate with your buddy if you feel any unusual pressure or discomfort.

Common mistakes and how to fix them

We all slip into patterns that feel safe but aren’t ideal. Here are a few frequent hiccups and straightforward fixes:

• Waiting too long to equalize: If you only react when the squeeze starts, you’ll be playing catch-up. Start the equalization a little earlier as you descend deeper than your initial comfort zone.

• Pinching too hard: Crushing your nose can cause discomfort and may hinder air movement. A light touch is enough—think “gentle pressure, clear result.”

• Not keeping the mouth relaxed: Jaws clenched or teeth tight can throw off the timing. Keep the jaw loose and breathe calmly through your nose and mouth when appropriate.

• Over-reliance on the mask: If you find yourself constantly needing to adjust the mask, check for a better mask fit or consider a slightly different mask style. A good seal matters as much as the technique itself.

• Ignoring ear pressure cues: Sometimes a mask squeeze and ear squeeze happen together. If you notice ear pressure building, it’s a signal to slow, pause, and re-evaluate your balance and technique.

A note on safety and awareness

Equalizing through the nose is a useful, proven method. But safety comes first. If you ever experience sharp, lingering pain in the ears, or if you feel dizziness or persistent discomfort, stop descending and ascend slowly to a shallower depth. If symptoms persist, seek skilled instruction or medical advice before continuing. It’s never worth pressing through pain when your body’s telling you something isn’t right.

A few words on hydration, environment, and gear

Environment matters, too. In colder water, the tendency for air to contract can change how you experience mask squeeze. In a windy surface, waves and water spray can lead to more frequent mask adjustments as you descend. A well-fitting mask with a comfortable skirt, dry air inside the mask for clear visibility, and a steady technique will keep things smoother. Your regulator, your buddy’s signals, and your overall awareness all come into play—this isn’t a solo sport; it’s a coordinated activity.

Relating to everyday life: a simple analogy helps

Think of it like holding a soda can underwater. As you go deeper, the water around the can is pressing harder. If you don’t adjust the air inside the can—your mask, in this case—the pressure difference grows. A gentle push from inside, via nasal equalization, helps balance things out so the mask doesn’t get pinched. It’s a small move with a big payoff: clear vision, comfortable fit, and safer, more confident movement.

Putting it all together: a practical routine

A reliable routine when you’re in the water:

• Check your mask fit before you enter the water.

• Once you’re below the surface and comfortable, start your descent gradually.

• As you notice the pressure difference, pinch your nose and blow gently to equalize.

• Keep your mouth relaxed and your breathing steady; continue this as you descend past each new depth.

• If you feel the squeeze easing and the mask feels comfortable again, resume normal swimming and maintain awareness for any further changes.

Final thoughts: trust the method that keeps your mask happy

Mask squeeze is one of those little, learned challenges that can trip you up if you’re not prepared. The nose-blow equalization is simple, intuitive, and incredibly effective when done with a light touch. It’s one of those skills that becomes second nature after a few confident uses, letting you focus more on exploration, communication with your buddy, and the beauty of the underwater world.

If you’re just starting out or refreshing your routine, give this technique a dedicated moment of practice—ideally in a controlled pool environment or shallow water. You’ll notice the difference as soon as you descend a bit, and you’ll be glad you did when you’re gliding through clear water, the mask settled comfortably, and your sense of calm intact.

And that’s the core idea behind staying comfortable and safe beneath the surface: practical techniques, practiced regularly, with a steady mind and a curious spirit. The ocean isn’t going anywhere, and with a simple nasal blow, you’ll be better prepared to meet it halfway, mask in place, ready for whatever wonders lie beyond the next reef.