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Three Reasons You Shouldn’t Leave Left Molar Pain Untreated

D-Day Dental Clinic · 통합치의학과 전문의 2명의 솔직한 치과 이야기 · July 18, 2025

Three Reasons You Shouldn’t Leave Left Molar Pain Untreated Hello, Are you worried because of left molar pain? I’m Kim Moo-jin, the chief director of D-Day Dental Clinic, committed...

AI translation notice

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: D-Day Dental Clinic

Original post date: July 18, 2025

Translated at: April 20, 2026 at 4:31 PM

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

Hello,

Are you worried because of left molar pain?

I’m Kim Moo-jin, the chief director of D-Day Dental Clinic, committed to preserving natural teeth, and a specialist in Integrated Dentistry.

Three Reasons You Shouldn’t Leave Left Molar Pain Untreated image 1

I always put my patients’ dental health first, and I strive to provide comfortable care :)

If you are reading this right now, you are probably someone whose left molar is throbbing and hurting, keeping you awake at night.

You may be holding out with painkillers, thinking, “If I just endure it, it’ll probably get better...”,

or putting it off, saying, “Dentists are scary, so let’s hold on a little longer.”

Three Reasons You Shouldn’t Leave Left Molar Pain Untreated image 2

But if you leave left molar pain untreated, it can become truly dangerous.

What starts as occasional pain can turn into a sharp, electric-like pain that appears even when you drink cold water,

and eventually you may suffer such severe pain that you cannot sleep through the night.

What’s more serious is that inflammation can spread all the way to the tooth root, causing your face to swell up,

and in the worst case, you could lose a precious tooth for good.

Today, I’d like to explain three reasons why left molar pain should never be left untreated.

I believe the information below will help you protect your precious teeth and regain your healthy daily life.

Table of Contents

  1. Left molar pain,

when decay spreads to the nerve, root canal treatment becomes unavoidable

  1. Left molar pain,

a pus sac can form at the end of the tooth root, and extraction may be necessary

  1. Left molar pain,

damage spreads to nearby teeth and the jawbone, causing a chain reaction

  1. Left molar pain,

when decay spreads to the nerve, root canal treatment becomes unavoidable

If a small cavity in the left molar is left untreated, it rapidly worsens, like a small spark spreading into a major fire.

At first, it may have been just a small hole in the enamel, the outermost layer of the tooth,

but over time, it passes through the dentin beneath it and infects the nerve at the center of the tooth. Three Reasons You Shouldn’t Leave Left Molar Pain Untreated image 3 Three Reasons You Shouldn’t Leave Left Molar Pain Untreated image 4 <Before> 240305 <After> 240319 When inflammation spreads to the nerve, severe pain occurs and root canal treatment becomes necessary.

Root canal treatment is the process of completely removing the infected nerve, thoroughly disinfecting the area, and then filling it with biocompatible material,

and it takes more time and cost than simple cavity treatment. Three Reasons You Shouldn’t Leave Left Molar Pain Untreated image 5

What is even more unfortunate is that a tooth that has undergone root canal treatment becomes weaker because its nutrient supply is cut off, so it must be covered with a crown.

A cavity that could have been simply filled with resin in the early stage ends up requiring a crown as well.

  1. Left molar pain,

a pus sac can form at the end of the tooth root, and extraction may be necessary

If you keep enduring molar pain, inflammation spreads to the tip of the tooth root and a pus sac forms.

This is called a periapical abscess, a frightening condition in which inflammation spreads deep into the bone, like an underground water vein.

Three Reasons You Shouldn’t Leave Left Molar Pain Untreated image 6

Once it reaches this stage, the gums become severely swollen, and in serious cases, even the face swells up,

and along with a high fever, your overall condition can rapidly worsen.

It is a truly dangerous situation because the infection can travel through the bloodstream and spread throughout the body, leading to sepsis.

At this point, even with excellent treatment, it is often difficult to save the tooth, so extraction becomes unavoidable.

Three Reasons You Shouldn’t Leave Left Molar Pain Untreated image 7

That means you may lose a precious natural tooth forever.

After extraction, prosthetic treatment such as an implant, bridge, or partial denture is needed,

and although these can replace a natural tooth, they can never be exactly the same.

  1. Left molar pain,

damage spreads to nearby teeth and the jawbone, causing a chain reaction

As the saying goes, “A small problem that could be handled with a hoe ends up needing a spade,” if you leave one molar problem untreated, issues will spread in a chain reaction to the surrounding teeth.

As inflammation spreads to the roots of adjacent teeth, even the healthy neighboring teeth can start to loosen.

Also, because of ongoing inflammation, the gum bone that supports the teeth begins to dissolve, which worsens periodontal disease as well. Three Reasons You Shouldn’t Leave Left Molar Pain Untreated image 8

Once bone has dissolved, it is difficult to regenerate, so even when you later receive implant treatment, bone grafting may additionally be needed.

In addition, if it becomes difficult to chew on the painful side and you keep using only the opposite side, extra strain is placed on the jaw joint.

Three Reasons You Shouldn’t Leave Left Molar Pain Untreated image 9

If this leads to temporomandibular joint disorder, you may hear sounds when opening or closing your mouth, and it can also be accompanied by headaches or shoulder stiffness.

Tooth pain is truly hard to bear.

Just imagining you tossing and turning all night without sleep hurts my heart.

But from now on, I hope you will no longer endure it alone.

As you can see from the three reasons I mentioned today, left molar pain does not simply end with “it hurts.”

As time passes, it becomes a bigger problem and may eventually cause you to lose a precious tooth.

Three Reasons You Shouldn’t Leave Left Molar Pain Untreated image 10

A “healthy tooth” is not just a tooth that does not hurt,

but the beginning of a happy daily life where you can smile comfortably and enjoy your meals.

Before the pain you are feeling now takes away your precious everyday life, I hope you will gather your courage and take that first step.

I always do my best to save my patients’ natural teeth.

Helping those suffering from left molar pain regain a healthy smile, that is exactly why I became a dentist :)

From today, I sincerely hope you will no longer suffer alone, and that you will regain a happy daily life with healthy teeth.

D-Day Dental Clinic will walk this path with you.

| A place that honestly recommends only the treatments you truly need | D-Day Dental Clinic Naver reservation ✔ |

Seoul D-Day Dental Clinic consultation inquiries
Main phone number: 02-568-2877 (Go directly) Naver TalkTalk inquiry (Go directly)

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| This post was written directly by D-Day Dental Clinic in compliance with Article 56, Paragraph 1 of the Medical Advertising Act, for the purpose of providing medical information and promoting the clinic. However, please use the information provided on this blog only as a reference, and for an accurate understanding of your individual symptoms, we recommend visiting a medical institution directly and confirming with medical staff. All procedures and surgeries performed at the dental clinic, including implants, may carry the risk of side effects depending on the individual (inflammation, bleeding, swelling, nerve damage, etc.). Therefore, please make decisions after充分 consultation with medical staff in advance. The treatment photos in this post were taken with the consent of a patient who completed all treatment processes at our clinic. The before-and-after photos are of the same person and were taken under the same conditions. |

Three Reasons You Shouldn’t Leave Left Molar Pain Untreated Three Reasons You Shouldn’t Leave Left Molar Pain Untreated image 12 Three Reasons You Shouldn’t Leave Left Molar Pain Untreated image 13 Three Reasons You Shouldn’t Leave Left Molar Pain Untreated image 14 Three Reasons You Shouldn’t Leave Left Molar Pain Untreated image 15 Three Reasons You Shouldn’t Leave Left Molar Pain Untreated image 16 Three Reasons You Shouldn’t Leave Left Molar Pain Untreated image 17 Three Reasons You Shouldn’t Leave Left Molar Pain Untreated image 18 Three Reasons You Shouldn’t Leave Left Molar Pain Untreated image 19

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