Do you breathe through your nose or mouth while you sleep? You may not give it much thought, but the way you breathe during the night can affect how your mouth and throat feel when you wake up.
Nasal breathing is the body’s natural way of breathing. However, nasal congestion, sleeping habits and other factors can cause you to sleep with your mouth open.
In this article, we explain the difference between nasal and mouth breathing, explore why nighttime mouth breathing happens and share practical ways to support nasal breathing.
What Is Nasal Breathing?
Nasal breathing means inhaling and exhaling through your nose. Your nose is specifically designed to prepare the air before it reaches your lungs.
As air passes through your nasal passages, it is filtered, warmed and humidified. Small hairs and mucus inside the nose help capture dust and other particles, while the nasal passages add warmth and moisture to the air.
This natural process can make breathing feel more comfortable, particularly while you are sleeping.
What Is Mouth Breathing?
Mouth breathing occurs when you breathe mainly through your mouth instead of your nose. It is normal to breathe through your mouth temporarily during intense exercise or when your nose is blocked.
However, some people regularly sleep with their mouth open without realising it. Continuous airflow through the mouth can cause moisture to evaporate from the lips, tongue, mouth and throat.
Do you regularly experience dryness in the morning? Discover why you may be waking up with a dry mouth and what you can do about it.
This may contribute to:
- Waking up with a dry mouth
- A dry or irritated throat
- Cracked or dry lips
- An unpleasant taste in the morning
- Feeling thirsty immediately after waking up
These symptoms do not automatically mean you are a mouth breather, but they may provide a reason to pay closer attention to your nighttime breathing.
Why Do People Breathe Through Their Mouth While Sleeping?
There are several possible reasons why someone may sleep with their mouth open.
Nasal Congestion
A blocked or congested nose makes nasal breathing more difficult. Colds, seasonal allergies and temporary irritation can all restrict airflow through the nose.
Your body may automatically switch to mouth breathing when it cannot get enough air through the nasal passages.
Sleeping Position
Your sleeping position may influence whether your mouth falls open during the night. Some people notice more mouth breathing when sleeping on their back.
Changing to a comfortable side-sleeping position may help, although results will vary.
Habitual Mouth Breathing
Sometimes mouth breathing becomes a habit, even when the nasal passages are clear. Becoming more aware of your daytime breathing and practising nasal breathing may help you recognise this pattern.
Structural or Medical Causes
A deviated septum, enlarged tonsils, nasal polyps or another condition may make nasal breathing more difficult. Persistent mouth breathing or nasal obstruction should be discussed with a qualified healthcare professional.
What Are the Differences Between Nasal and Mouth Breathing?
The main difference is how the air enters your body.
When you breathe through your nose, the air is filtered, warmed and humidified before reaching your lungs. Mouth breathing bypasses much of this natural process.
Mouth breathing also allows air to flow directly across the soft tissues inside your mouth. During several hours of sleep, this increased airflow may contribute to dryness and discomfort.
This does not mean nasal breathing will guarantee deeper sleep or solve a sleep disorder. Sleep quality is affected by many different factors, and scientific evidence supporting some popular mouth-taping claims remains limited.
How Can You Encourage Nasal Breathing at Night?
If you can breathe freely through your nose, a few simple habits may help you support nasal breathing while sleeping.
Check Your Nasal Airflow
Before going to bed, make sure you can comfortably breathe through both nostrils. Never try to force nasal breathing if your nose is blocked or breathing feels difficult.
Stay Properly Hydrated
Drink water regularly throughout the day. Proper hydration may help keep the tissues in your mouth and throat more comfortable.
Improve Your Bedroom Environment
A very dry or overheated bedroom can make morning dryness feel worse. Ventilating the room or using a humidifier may help create a more comfortable sleeping environment.
Pay Attention to Daytime Breathing
Notice whether you naturally keep your lips closed and breathe through your nose during the day. Gentle breathing exercises may help you become more conscious of your breathing habits.
Consider Purpose-Designed Mouth Tape
Adults who can breathe comfortably through their nose may consider using a purpose-designed mouth tape to support a closed-mouth position while sleeping.
BoomBoom Mouth Tape is designed with soft, breathable material and a skin-friendly adhesive. It provides gentle support without adding a complicated step to your nighttime routine.
Before trying it, learn how to use mouth tape safely and discover when it should be avoided.
How Do You Use Mouth Tape Comfortably?
Start by cleaning and drying your lips and the surrounding skin. Close your mouth naturally and apply the strip according to the instructions supplied with the product.
Always check that you can breathe freely through your nose before going to sleep.
If you have never used mouth tape before, try wearing it for a few minutes during the day. This allows you to become familiar with the sensation in a calm and controlled environment.
Remove the tape immediately if you feel anxious, uncomfortable or unable to breathe normally.
When Should You Avoid Mouth Tape?
Mouth tape is not appropriate for everyone. Do not use it if you have:
- A blocked or congested nose
- A cold or respiratory infection
- Difficulty breathing through your nose
- Known or suspected sleep apnoea
- Skin irritation around your lips
- Anxiety or discomfort related to having your mouth covered
Mouth tape is not intended to diagnose, treat or prevent snoring, sleep apnoea or any other medical condition.
Persistent snoring, interrupted breathing, unexplained daytime tiredness or recurring sleep problems should always be discussed with a healthcare professional.
Make Nasal Breathing Part of Your Evening Routine
Understanding the difference between nasal and mouth breathing can help you become more aware of your nighttime habits.
Nasal breathing naturally filters, warms and humidifies the air, while sleeping with an open mouth may contribute to dryness and an unpleasant morning feeling.
If your nose is completely clear and you want gentle support for a closed-mouth sleeping position, BoomBoom Mouth Tape can be a simple addition to your routine.
A comfortable evening starts with consistent habits. Discover how to build a better nighttime routine in eight simple steps.
Discover BoomBoom Mouth Tape and support your nighttime nasal-breathing routine.
Frequently Asked Questions
Is nasal breathing better than mouth breathing while sleeping?
Your nose naturally filters, warms and humidifies incoming air. Mouth breathing bypasses these functions and may cause the mouth or throat to feel dry. This does not mean nasal breathing can treat sleep disorders.
How do I know if I breathe through my mouth at night?
Possible signs include waking up with a dry mouth, dry throat, cracked lips or an unpleasant taste. These symptoms can have other causes, so consult a healthcare professional if they persist.
Can I train myself to breathe through my nose?
Becoming more aware of your daytime breathing and practising gentle nasal breathing may help support the habit. Seek medical advice if nasal breathing regularly feels difficult.
Does mouth tape stop mouth breathing?
Purpose-designed mouth tape supports a closed-mouth position and may encourage nasal breathing. It should only be used by adults who can already breathe freely and comfortably through their nose.