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Gangnam Station Dentist: Bad Breath — Why Does It Happen and How Can You Fix It?

LUCID Dental Clinic · 루시드치과 · December 9, 2025

​ Hello. This is Lucid Dental Clinic. One of the most worrying issues in everyday life, yet something that is difficult to tell someone about, is bad breath. ​ You may not notice i...

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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: LUCID Dental Clinic

Original post date: December 9, 2025

Translated at: April 20, 2026 at 5:38 PM

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

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Hello. This is Lucid Dental Clinic.

One of the most worrying issues in everyday life, yet something that is difficult to tell someone about, is bad breath.

You may not notice it yourself, but when you wear a mask, when you wake up in the morning, or when you suddenly feel sensitive during a conversation, there are moments when you become aware of your breath.

Bad breath is not just a matter of discomfort; it is often a 'signal' that shows the condition of your oral health. That is why it is more important than anything else to understand the cause accurately and manage it properly.

Today, I’ll summarize everything from the reasons bad breath occurs to how to manage it.

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Why does bad breath occur?

Bad breath mainly arises from three causes.

  1. Physiological bad breath: a natural odor that can happen to anyone

Temporary bad breath such as morning breath, breath from an empty stomach, or bad breath during stressful situations is mostly caused by decreased saliva secretion > increased bacterial activity.

  1. Bad breath originating in the mouth: accounts for 80–90% of cases

The most common cause is inside the mouth.

▪️Tongue coating (white coating)

▪️Tartar, plaque

▪️Cavities, gum inflammation

▪️Dry mouth

▪️Poor hygiene around prosthetic appliances

In particular, tartar is difficult to remove on your own, so if left untreated for just a few months, bad breath can easily develop.

  1. Systemic factors outside the mouth

▪️Tonsil stones

▪️Acid reflux

▪️Rhinitis, sinusitis

▪️Dryness caused by certain medications

▪️Problems with the respiratory system

In these cases, even if you clean your mouth thoroughly, the odor may persist, so both oral and systemic factors need to be considered together.

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Check points you can look at yourself

▪️When the surface of the tongue looks thick and white

▪️When the odor becomes strong after using dental floss

▪️When your breath feels worse as the afternoon goes on

▪️When your mouth feels dry often enough that you need to drink water frequently

▪️When the area around prosthetic appliances feels unpleasant

In such cases, there is often an oral cause.

How to manage bad breath at home

▪️Use a tongue cleaner

Tongue coating is the most common cause of bad breath.

▪️Use dental floss and interdental brushes

Food residue that a toothbrush cannot reach is a major cause of odor.

▪️Drink water often

When the mouth is dry, bacterial activity becomes more active.

▪️Mouthwash is 'supportive' only

It may provide temporary freshness, but it does not solve the underlying cause.

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What if bad breath does not improve even with self-care?

This is something many people worry about, and they visit Lucid Dental Clinic.

Bad breath can sometimes be resolved with temporary care, but in the situations below, it is almost impossible to fix on your own.

▪️When tongue coating builds up heavily and frequently

▪️When tartar has been left untreated for a long time

▪️When gum inflammation continues

▪️When food frequently gets stuck around prosthetic appliances

▪️When certain areas are worn down due to an unbalanced bite, making care difficult

▪️When the odor comes from a deep area that is hard to check on your own

Because this kind of bad breath cannot be solved with ordinary cleaners or brushing, it is most important to identify the cause accurately.

How does Lucid Dental Clinic check for bad breath?

If you visit Lucid Dental Clinic for bad breath, we do not simply check your breath odor. We also look at the factors that may be connected to it from multiple angles.

Tongue coating condition

We check whether tongue coating builds up frequently, and whether your management method is appropriate.

Tartar, plaque, and gum condition

We check for periodontitis and inflammation in deeper areas.

Around prosthetic appliances

We check whether there are gaps at the margins of the prosthetic appliance or whether the structure makes food easily get stuck.

Dry mouth

We also look into the causes of dryness, such as whether you take medication or breathe through your mouth.

Bite condition

We check whether certain areas are wearing down excessively and whether the structure makes care difficult.

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If you want to solve bad breath?

Bad breath is not simply a matter of 'bad breath'; it is often a sign that something is changing inside the mouth.

That is why at Lucid Dental Clinic, for patients whose bad breath keeps recurring, we suggest the following approach.

Detailed oral condition check

We identify the cause of bad breath by checking even deep areas that cannot be seen with the naked eye.

Guidance on management methods suited to the individual condition

We explain what factors may be causing bad breath, such as tongue coating, tartar, around prosthetic appliances, and gum condition, so that you can manage it yourself.

Step-by-step care when needed, such as scaling or prosthetic adjustment

Because the care needed depends on the patient’s condition, we do not provide 'treatment no matter what.' Instead, after accurately analyzing the cause, we provide only the necessary care.

After receiving this guidance, most people say, 'I understand why my breath smelled bad.' This is also one of the things patients are most satisfied with after a consultation at Lucid Dental Clinic.

We recommend a checkup for people like this

▪️People whose bad breath continues despite daily care

▪️People who notice bad breath not only in the morning but throughout the day

▪️People whose tongue coating builds up thickly and often

▪️People who have not had scaling in a long time

▪️People with severe dry mouth

▪️People who often feel discomfort around prosthetic appliances

In most of these cases, there is an oral cause, so an accurate check at Lucid Dental Clinic can be helpful.

Bad breath is not just a simple inconvenience; it is often an important signal that shows the condition of oral health.

In some cases, it improves with lifestyle management, but if bad breath has lasted a long time, the most reliable thing is to check what changes are happening inside your mouth now.

At Lucid Dental Clinic, we identify the cause of bad breath step by step, and then provide management methods suited to the patient’s lifestyle pattern and oral structure.

If bad breath is causing inconvenience in your daily life, don’t worry about it alone—please get an accurate examination.

Once you know the cause, the direction toward a solution becomes clear.

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Lucid Dental Clinic 3rd–4th Floors, Coway Building, 606 Nonhyeon-ro, Gangnam-gu, Seoul

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