How to Stop Mouth Breathing: A Complete Step-by-Step Guide

Step 1: Identify Why You're Mouth Breathing

Before you can fix mouth breathing, you need to understand why it's happening. The most common causes include:

• Nasal congestion or allergies: Blocked nasal passages force you to breathe through your mouth. Seasonal allergies, dust mite sensitivity, and food intolerances are common culprits.
• Deviated septum: A crooked nasal septum can restrict airflow on one or both sides, making nasal breathing difficult.
• Enlarged adenoids or tonsils: Common in children, but adults can be affected too. These block the upper airway, forcing mouth breathing.
• Habit: Many adults have simply fallen into the habit of mouth breathing, even when their nasal passages are clear. This is particularly common in people who were mouth breathers as children.
• Stress and anxiety: Stress triggers shallow chest breathing through the mouth. Over time, this can become the default breathing pattern.

Self-test: Sit quietly for 5 minutes and notice where your mouth and tongue rest. Is your mouth slightly open? Is your tongue on the floor of your mouth rather than the roof? These are signs of habitual mouth breathing.

Step 2: Nasal Breathing Exercises

The following exercises — drawn from the Buteyko method and standard breathing therapy — help reduce nasal congestion, strengthen breathing muscles, and retrain your body to breathe nasally.

Exercise 1: Nose Unblocking Technique

This is the fastest way to relieve nasal congestion without medication:

1. Take a small breath in through your nose (if possible) and a small breath out
2. Pinch your nose closed with your fingers
3. Nod your head up and down, or walk around, while holding your breath
4. When you feel a strong urge to breathe, let go and breathe in slowly through your nose
5. Rest for 30–60 seconds and repeat 5–6 times

This temporarily increases CO2, which dilates the nasal passages. Most people notice improved airflow within minutes.

Exercise 2: Reduced Breathing

Also called "breathing less" — the core of the Buteyko method:

1. Breathe in gently through your nose
2. Breathe out gently through your nose
3. After the exhale, pause for 2–3 seconds before your next inhale
4. Repeat for 10–15 minutes

The goal is to breathe slightly less than you feel you need to — creating a mild air hunger. This normalises your CO2 set point over time, reducing the drive to mouth breathe.

Exercise 3: Alternate Nostril Breathing (Nadi Shodhana)

From yoga tradition, this balances nasal airflow:

1. Close your right nostril with your thumb and inhale through the left
2. Close both nostrils briefly
3. Open the right nostril and exhale slowly
4. Inhale through the right nostril
5. Close both briefly, then exhale through the left
6. This is one cycle — do 5–10 cycles

Do this twice daily, ideally in the morning and before bed.

Step 3: Mouth Taping at Night

Sleep is when most mouth breathing occurs — and when it does the most damage. During sleep, you lose conscious control over your breathing pattern, meaning even people who successfully breathe nasally during the day often revert to mouth breathing at night.

Mouth taping — using a small piece of medical-grade tape across the lips during sleep — is a simple, effective intervention that has been gaining mainstream attention. Studies have shown it can improve sleep quality, reduce snoring, and support nasal breathing habits.

Start with a small piece of hypoallergenic medical tape (like 3M Micropore) or a purpose-made mouth tape product. Apply gently across the lips — you can orient it vertically or horizontally, whichever is more comfortable. If you feel panicked or unable to breathe, remove it immediately.

Most people find they adapt within a week and sleep noticeably better.

Step 4: Correct Tongue Posture (Mewing)

Correct tongue posture is foundational to nasal breathing. When your tongue rests on the roof of your mouth — the palate — it naturally keeps your mouth closed and supports nasal breathing. When it rests on the floor of your mouth, your mouth tends to fall open.

The technique of consciously placing the tongue on the palate has been popularised online as "mewing" (after orthodontist Dr. John Mew), but the underlying principle is standard myofunctional therapy.

How to Find the Correct Tongue Position

1. Say the word "sing" — notice where your tongue rests at the end of the word. That's approximately where it should be.
2. The entire tongue (not just the tip) should press gently against the entire roof of the mouth
3. Your lips should be together but teeth not clenched
4. Breathe only through your nose

This takes conscious effort at first. Set hourly reminders to check your tongue position. Over weeks, it becomes habitual.

For children, establishing correct tongue posture early is especially important — it influences facial development and jaw structure significantly.

Step 5: Lifestyle Changes That Help

• Treat allergies: Nasal congestion from allergies is a major driver of mouth breathing. An antihistamine or nasal steroid spray can be transformative.
• Use a humidifier: Dry air irritates nasal passages. Sleeping with a humidifier (40–50% humidity) can improve nasal airflow significantly.
• Sleep on your side: Back sleeping worsens mouth breathing and snoring. Side sleeping naturally encourages nasal breathing.
• Exercise regularly: Cardiovascular exercise strengthens breathing muscles and improves your tolerance for nasal breathing under exertion.
• Reduce dairy: Some people find that reducing dairy consumption reduces mucus production and nasal congestion.

When to See a Doctor

Self-help approaches work well for habitual mouth breathers without structural issues. But see a doctor or ENT specialist if:

• You have chronic nasal congestion that doesn't respond to antihistamines or nasal sprays
• You've been told you snore loudly or stop breathing during sleep (potential sleep apnea — requires medical diagnosis)
• Your child has enlarged tonsils or adenoids, persistent mouth breathing, or orthodontic issues
• You suspect a deviated septum or other structural issue
• Exercises and mouth taping haven't helped after 4–6 weeks

A myofunctional therapist can also be invaluable — they specialise in retraining the muscles of the mouth, face, and throat to support nasal breathing.