Humming feels good. Most of us do it without thinking: over the dishes, on a walk, while concentrating. It turns out this simple, ancient habit has a measurable effect on the body, one researchers have studied for more than two decades. Popular wellness writing has also stretched the findings far beyond what the science shows. Here is what we know, and how to use it wisely.

Humming has always been an important part of my life in being able to interact with others. It started with animals. I could hum or sing or gently use my voice to establish a relationship with a wild creature, the unruly horse, the distraught cow, or any other creature under stress or duress. Then I applied the same principle to people: how could my voice be calming, and how could it encourage them to hum themselves? With clients, it became: let's hum together, let's speak together, let's get our vibration into our body. Whether it's a yoga class or someone who has just come in off the street, I'll set them down in the chair and say, Hmm, let's get present here today before we start on whatever we're going to do. Let's hum a bit, and then you can tell me all about it.

The Discovery: Humming and Nitric Oxide

In 2002, two Swedish researchers, Eddie Weitzberg and Jon Lundberg, measured a gas called nitric oxide in people's nasal passages. They compared quiet breathing out through the nose with humming. During humming, nasal nitric oxide rose about fifteenfold.

That is a striking number, and it has been repeated in later studies. The question is what it means.

Where the Nitric Oxide Comes From

Your paranasal sinuses, the air-filled spaces behind your cheeks and forehead, continuously produce nitric oxide. It collects there behind small openings called ostia, which connect the sinuses to the nasal passages.

During ordinary breathing, very little of that stored gas moves out. Humming changes this. The vibration of your voice makes the air in the nasal passages oscillate, and that oscillation flushes the sinuses and washes the stored nitric oxide into the nose.

So humming doesn't make your body produce more nitric oxide. It releases what is already there and improves the air exchange between your sinuses and nasal passages.

Why This Matters for Your Airways

In the nose and sinuses, nitric oxide plays a local role. It supports the tiny hair-like cilia that sweep mucus and debris out of the airway, and it is part of the body's first line of defense against microbes. Better sinus ventilation is a plausible benefit for nasal and sinus health.

"Plausible" is the honest word here. These studies measured what happens to nitric oxide levels, mostly in small groups of healthy volunteers. No clinical trials have yet shown that humming prevents sinus infections or treats sinusitis. The mechanism is real; the outcomes are still unproven.

The Myth to Leave Behind: Humming and Blood Pressure

You may have read that humming boosts circulation, lowers blood pressure, or raises nitric oxide throughout your body. The research does not support those claims.

The nitric oxide that relaxes blood vessels and affects blood pressure is produced by the lining of the blood vessels themselves, a separate system from the nitric oxide in your sinuses. Humming also happens while you breathe out, so most of the released gas leaves your body. The fifteenfold figure is about your nose, not your heart.

How to Hum Well

Research shows the effect fades with repetition. The first hum releases the most nitric oxide, and each hum after it releases less as the sinuses empty. After a few minutes of quiet, the levels recover.

That suggests a simple practice:

  1. Sit comfortably and breathe in gently through your nose.
  2. With your lips closed, hum on a comfortable, steady note for the length of one easy exhale. Notice the vibration in your face and head.
  3. Breathe normally for a few breaths.
  4. Repeat three to five times.
  5. Rest for several minutes before another round.

Short bouts with pauses work better than continuous humming. If your nose is fully blocked, as with severe congestion or polyps, humming won't have this effect, because the sinus openings need to be clear.

And if sinus pressure, congestion, or facial pain lasts more than a week or two, or keeps coming back, see your doctor. Humming is a supportive habit, not a treatment, and I am an educator, not a physician.

A Note on Reflection

As you practice, pay attention to how it feels. Where in your body do you sense the vibration? Does your breath slow? Many people find humming calming. That's worth noticing for its own sake, even though it is a separate question from the nitric oxide research. (If the slower breath is what you notice most, my ten-minute nervous system reset builds on it.)

Humming is free, gentle, and available anytime. Approach it as a supportive habit for your nasal airways, not a cure-all, and you'll be on solid ground.

Questions people ask about humming

What are the benefits of humming?

Humming flushes nitric oxide stored in your sinuses into your nose, raising nasal levels about fifteenfold. In the nose and sinuses, nitric oxide supports the cilia that clear mucus and is part of the body's first line of defense against microbes, so better sinus ventilation is a plausible benefit. Many people also find humming calming, which is a separate question from the nitric oxide research.

Does humming increase nitric oxide?

It increases nitric oxide in your nose, by releasing what your sinuses have already stored. It doesn't make your body produce more nitric oxide, and it doesn't raise nitric oxide throughout the body.

Does humming lower blood pressure?

The research doesn't support that. The nitric oxide that relaxes blood vessels is made by the lining of the blood vessels themselves, a separate system from the nitric oxide in your sinuses, and most of the gas humming releases leaves your body as you breathe out.

Can humming treat a sinus infection?

No clinical trials have shown that humming prevents sinus infections or treats sinusitis. If sinus pressure, congestion, or facial pain lasts more than a week or two, or keeps coming back, see your doctor.

How long should you hum?

Short bouts with pauses work best. The first hum releases the most nitric oxide and each one after releases less, so hum on one easy exhale, breathe normally for a few breaths, repeat three to five times, then rest for several minutes before another round.

Is humming good for you?

Humming is free, gentle, and available anytime. Approach it as a supportive habit for your nasal airways, not a cure-all. If your nose is fully blocked, it won't have this effect, because the sinus openings need to be clear.

Take the next step. Not sure what's quietly costing you energy? The free Effortless quiz takes about a minute. It names the pattern and sends you a short guided meditation made for it. Take the free quiz →

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