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Learn About the Problems That Can Occur When You Breathe Through Your Mouth

Sinchon Dain Dental Hospital · 신촌다인치과병원 · March 14, 2024

Learn About the Problems That Can Occur When You Breathe Through Your Mouth Breathing and smelling through the nose is natural, but sometimes your nose gets blocked and you cannot...

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This page is an English translation of a Korean Naver Blog archive entry. For exact wording and source context, verify against the Korean archive original and the original Naver post.

Clinic: Sinchon Dain Dental Hospital

Original post date: March 14, 2024

Translated at: April 24, 2026 at 4:36 AM

Medical note: This translation does not guarantee medical accuracy or suitability for treatment decisions.

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Breathing and smelling through the nose is natural, but sometimes

your nose gets blocked and you cannot breathe through your nose, so you end up breathing through your mouth.

However, breathing through your mouth can cause a variety of symptoms, so if you have the habit of mouth breathing, it is a good idea to improve it.

Let’s look at what problems can occur when you breathe through your mouth and how the symptoms can be improved.

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When your nose is blocked, you have no choice but to breathe through your mouth. Allergic rhinitis, sinusitis, and a deviated septum can cause nasal congestion and lead to mouth breathing.

In the case of these nasal conditions, most are chronic, so even if there is discomfort, people may get used to it and not receive proper treatment.

However, if you breathe through your mouth instead of breathing through your nose, it can cause various symptoms.

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First of all, breathing through your mouth can increase the likelihood of developing respiratory illnesses such as colds, the flu, and tonsillitis.

When you breathe through your nose, air is filtered by nose hairs and mucus before entering the lungs, but when you breathe through your mouth, air goes straight into the lungs without this process.

Because harmful germs and dust can enter the bronchial tubes and lungs without being properly filtered, the likelihood of developing respiratory illnesses can increase.

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Breathing through your mouth can cause headaches. If you cannot breathe through your nose and breathe through your mouth instead, the amount of oxygen you can take in decreases, which can lead to complaints of headaches.

For this reason, many patients with nasal congestion complain of headaches, and if this condition continues, it can lead to problems such as reduced concentration.

The quality of sleep can also decline. If the nose is severely blocked and you breathe through your mouth, it can cause snoring or sleep apnea.

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When you breathe through your mouth, the saliva in your mouth dries out, which can cause bad breath, cavities, and periodontal disease.

Saliva has antibacterial effects, but if it dries out due to mouth breathing, its antibacterial function decreases, which can lead to cavities.

Not only that, but breathing through your mouth can also affect the growth of the jawbone and change facial features.

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As such, mouth breathing can cause various problems, so it is a good idea to develop the habit of breathing through your nose.

If it is difficult to breathe because your nose is blocked, using a humidifier or a wet towel to maintain proper indoor humidity can help improve symptoms.

We have looked at what problems can occur when you breathe through your mouth and how to improve the symptoms. Please refer to this information.

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